625399992 has 96 divisors (see below), whose sum is σ = 2019962880. Its totient is φ = 170913600.

The previous prime is 625399987. The next prime is 625399997. The reversal of 625399992 is 299993526.

625399992 is a `hidden beast` number, since 625 + 3 + 9 + 9 + 9 + 9 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (625399987) and next prime (625399997).

It is a super-2 number, since 2×625399992² = 782250299987200128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625399997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15384 + ... + 38567.

It is an arithmetic number, because the mean of its divisors is an integer number (21041280).

Almost surely, 2^625399992 is an apocalyptic number.

It is an amenable number.

625399992 is an abundant number, since it is smaller than the sum of its proper divisors (1394562888).

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

625399992 is a wasteful number, since it uses less digits than its factorization.

625399992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53993 (or 53986 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 54.

The square root of 625399992 is about 25007.9985604606. The cubic root of 625399992 is about 855.1703282286.

The spelling of 625399992 in words is "six hundred twenty-five million, three hundred ninety-nine thousand, nine hundred ninety-two".