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31420000 = 25541571
BaseRepresentation
bin111011111011…
…0111001100000
32012010022010201
41313312321200
531020420000
63041234544
7531031333
oct167667140
965108121
1031420000
1116810347
12a632a54
136681421
14425c61a
152b5996a
hex1df6e60

31420000 has 60 divisors (see below), whose sum is σ = 77347116. Its totient is φ = 12560000.

The previous prime is 31419979. The next prime is 31420009. The reversal of 31420000 is 2413.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 19215 + ... + 20785.

Almost surely, 231420000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31420000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38673558).

31420000 is an abundant number, since it is smaller than the sum of its proper divisors (45927116).

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

31420000 is an equidigital number, since it uses as much as digits as its factorization.

31420000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 31420000 is about 5605.3545828966. The cubic root of 31420000 is about 315.5503940907.

Adding to 31420000 its reverse (2413), we get a palindrome (31422413).

The spelling of 31420000 in words is "thirty-one million, four hundred twenty thousand".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 80 100 125 160 200 250 400 500 625 800 1000 1250 1571 2000 2500 3142 4000 5000 6284 7855 10000 12568 15710 20000 25136 31420 39275 50272 62840 78550 125680 157100 196375 251360 314200 392750 628400 785500 981875 1256800 1571000 1963750 3142000 3927500 6284000 7855000 15710000 31420000