625504040 has 64 divisors (see below), whose sum is σ = 1620812160. Its totient is φ = 212808960.

The previous prime is 625503973. The next prime is 625504057. The reversal of 625504040 is 40405526.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28154 + ... + 45206.

It is an arithmetic number, because the mean of its divisors is an integer number (25325190).

Almost surely, 2^625504040 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 625504040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810406080).

625504040 is an abundant number, since it is smaller than the sum of its proper divisors (995308120).

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

625504040 is a wasteful number, since it uses less digits than its factorization.

625504040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17202 (or 17198 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 625504040 is about 25010.0787683686. The cubic root of 625504040 is about 855.2177505874.

Adding to 625504040 its reverse (40405526), we get a palindrome (665909566).

The spelling of 625504040 in words is "six hundred twenty-five million, five hundred four thousand, forty".