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745619420 = 2257132291789
BaseRepresentation
bin101100011100010…
…011111111011100
31220222000101120002
4230130103333130
53011334310140
6201553113432
724322442360
oct5434237734
91828011502
10745619420
113529789a7
12189858878
13bb622930
14710512a0
15456d4415
hex2c713fdc

745619420 has 96 divisors (see below), whose sum is σ = 1936636800. Its totient is φ = 234814464.

The previous prime is 745619419. The next prime is 745619431. The reversal of 745619420 is 24916547.

It is a super-2 number, since 2×7456194202 = 1111896638962272800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 415886 + ... + 417674.

It is an arithmetic number, because the mean of its divisors is an integer number (20173300).

Almost surely, 2745619420 is an apocalyptic number.

745619420 is a gapful number since it is divisible by the number (70) 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 745619420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968318400).

745619420 is an abundant number, since it is smaller than the sum of its proper divisors (1191017380).

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

745619420 is a wasteful number, since it uses less digits than its factorization.

745619420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047 (or 2045 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 745619420 is about 27306.0326667936. The cubic root of 745619420 is about 906.7879430357.

The spelling of 745619420 in words is "seven hundred forty-five million, six hundred nineteen thousand, four hundred twenty".

Divisors: 1 2 4 5 7 10 13 14 20 26 28 35 52 65 70 91 130 140 182 229 260 364 455 458 910 916 1145 1603 1789 1820 2290 2977 3206 3578 4580 5954 6412 7156 8015 8945 11908 12523 14885 16030 17890 20839 23257 25046 29770 32060 35780 41678 46514 50092 59540 62615 83356 93028 104195 116285 125230 162799 208390 232570 250460 325598 409681 416780 465140 651196 813995 819362 1627990 1638724 2048405 2867767 3255980 4096810 5325853 5735534 8193620 10651706 11471068 14338835 21303412 26629265 28677670 37280971 53258530 57355340 74561942 106517060 149123884 186404855 372809710 745619420