625004640 has 384 divisors, whose sum is σ = 2438553600. Its totient is φ = 148469760.

The previous prime is 625004623. The next prime is 625004647. The reversal of 625004640 is 46400526.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625004647) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1740781 + ... + 1741139.

It is an arithmetic number, because the mean of its divisors is an integer number (6350400).

Almost surely, 2^625004640 is an apocalyptic number.

625004640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625004640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1219276800).

625004640 is an abundant number, since it is smaller than the sum of its proper divisors (1813548960).

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

625004640 is a wasteful number, since it uses less digits than its factorization.

625004640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 625004640 is about 25000.0927998278. The cubic root of 625004640 is about 854.9900891434.

The spelling of 625004640 in words is "six hundred twenty-five million, four thousand, six hundred forty".