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129490380 = 22335376481
BaseRepresentation
bin1111011011111…
…01110111001100
3100000122210102000
413231331313030
5231122143010
620503232300
73131435655
oct755756714
9300583360
10129490380
1167104048
1237448690
1320a9a836
14132aa52c
15b57c7c0
hex7b7ddcc

129490380 has 96 divisors (see below), whose sum is σ = 413810880. Its totient is φ = 33592320.

The previous prime is 129490369. The next prime is 129490381. The reversal of 129490380 is 83094921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (129490381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16740 + ... + 23220.

It is an arithmetic number, because the mean of its divisors is an integer number (4310530).

Almost surely, 2129490380 is an apocalyptic number.

129490380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129490380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206905440).

129490380 is an abundant number, since it is smaller than the sum of its proper divisors (284320500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129490380 is a wasteful number, since it uses less digits than its factorization.

129490380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6536 (or 6528 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 129490380 is about 11379.3839903573. The cubic root of 129490380 is about 505.9168782416.

The spelling of 129490380 in words is "one hundred twenty-nine million, four hundred ninety thousand, three hundred eighty".

Divisors: 1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 37 45 54 60 74 90 108 111 135 148 180 185 222 270 333 370 444 540 555 666 740 999 1110 1332 1665 1998 2220 3330 3996 4995 6481 6660 9990 12962 19443 19980 25924 32405 38886 58329 64810 77772 97215 116658 129620 174987 194430 233316 239797 291645 349974 388860 479594 583290 699948 719391 874935 959188 1166580 1198985 1438782 1749870 2158173 2397970 2877564 3499740 3596955 4316346 4795940 6474519 7193910 8632692 10790865 12949038 14387820 21581730 25898076 32372595 43163460 64745190 129490380