250564640 has 48 divisors (see below), whose sum is σ = 612382680. Its totient is φ = 96768000.

The previous prime is 250564627. The next prime is 250564667. The reversal of 250564640 is 46465052.

It can be written as a sum of positive squares in 4 ways, for example, as 170354704 + 80209936 = 13052^2 + 8956^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 250564597 and 250564606.

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 7 ways as a sum of consecutive naturals, for example, 22361 + ... + 31640.

Almost surely, 2^250564640 is an apocalyptic number.

250564640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

250564640 is an abundant number, since it is smaller than the sum of its proper divisors (361818040).

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

250564640 is a wasteful number, since it uses less digits than its factorization.

250564640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54045 (or 54037 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 250564640 is about 15829.2337148707. The cubic root of 250564640 is about 630.4344362217.

The spelling of 250564640 in words is "two hundred fifty million, five hundred sixty-four thousand, six hundred forty".