625025640 has 128 divisors (see below), whose sum is σ = 1941667200. Its totient is φ = 160849920.

The previous prime is 625025633. The next prime is 625025641. The reversal of 625025640 is 46520526.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 625025598 and 625025607.

It is not an unprimeable number, because it can be changed into a prime (625025641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 458560 + ... + 459920.

It is an arithmetic number, because the mean of its divisors is an integer number (15169275).

Almost surely, 2^625025640 is an apocalyptic number.

625025640 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 625025640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970833600).

625025640 is an abundant number, since it is smaller than the sum of its proper divisors (1316641560).

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

625025640 is a wasteful number, since it uses less digits than its factorization.

625025640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507 (or 1503 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 625025640 is about 25000.5127947408. The cubic root of 625025640 is about 854.9996648540. Note that the first 3 decimals are identical.

The spelling of 625025640 in words is "six hundred twenty-five million, twenty-five thousand, six hundred forty".