625748724 has 36 divisors (see below), whose sum is σ = 1620336900. Its totient is φ = 203495040.

The previous prime is 625748713. The next prime is 625748729. The reversal of 625748724 is 427847526.

It is a happy number.

625748724 is a `hidden beast` number, since 6 + 2 + 574 + 8 + 72 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 185504400 + 440244324 = 13620^2 + 20982^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×625748724² = 783122931175256352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 625748724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625748729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210499 + ... + 213450.

Almost surely, 2^625748724 is an apocalyptic number.

It is an amenable number.

625748724 is an abundant number, since it is smaller than the sum of its proper divisors (994588176).

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

625748724 is a wasteful number, since it uses less digits than its factorization.

625748724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424000 (or 423995 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The square root of 625748724 is about 25014.9699979832. The cubic root of 625748724 is about 855.3292504375.

The spelling of 625748724 in words is "six hundred twenty-five million, seven hundred forty-eight thousand, seven hundred twenty-four".