625138460 has 24 divisors (see below), whose sum is σ = 1315421856. Its totient is φ = 249554240.

The previous prime is 625138447. The next prime is 625138489. The reversal of 625138460 is 64831526.

It is a self number, because there is not a number n which added to its sum of digits gives 625138460.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21011 + ... + 41130.

It is an arithmetic number, because the mean of its divisors is an integer number (54809244).

Almost surely, 2^625138460 is an apocalyptic number.

It is an amenable number.

625138460 is an abundant number, since it is smaller than the sum of its proper divisors (690283396).

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

625138460 is a wasteful number, since it uses less digits than its factorization.

625138460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62653 (or 62651 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 625138460 is about 25002.7690466476. The cubic root of 625138460 is about 855.0511055484.

Adding to 625138460 its reverse (64831526), we get a palindrome (689969986).

The spelling of 625138460 in words is "six hundred twenty-five million, one hundred thirty-eight thousand, four hundred sixty".