625129920 has 112 divisors (see below), whose sum is σ = 2205349920. Its totient is φ = 166699008.

The previous prime is 625129873. The next prime is 625129927. The reversal of 625129920 is 29921526.

It is a happy number.

625129920 is a `hidden beast` number, since 625 + 1 + 2 + 9 + 9 + 20 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625129927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27537 + ... + 44816.

Almost surely, 2^625129920 is an apocalyptic number.

625129920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

625129920 is an abundant number, since it is smaller than the sum of its proper divisors (1580220000).

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

625129920 is a wasteful number, since it uses less digits than its factorization.

625129920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72379 (or 72363 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 625129920 is about 25002.5982649804. The cubic root of 625129920 is about 855.0472119205.

The spelling of 625129920 in words is "six hundred twenty-five million, one hundred twenty-nine thousand, nine hundred twenty".