250532640 has 72 divisors (see below), whose sum is σ = 854947548. Its totient is φ = 66808320.

The previous prime is 250532617. The next prime is 250532647. The reversal of 250532640 is 46235052.

It can be written as a sum of positive squares in 2 ways, for example, as 250525584 + 7056 = 15828^2 + 84^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (250532647) 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, 85551 + ... + 88430.

Almost surely, 2^250532640 is an apocalyptic number.

250532640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

250532640 is an abundant number, since it is smaller than the sum of its proper divisors (604414908).

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

250532640 is a wasteful number, since it uses less digits than its factorization.

250532640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174002 (or 173991 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 250532640 is about 15828.2228945640. Note that the first 3 decimals coincide. The cubic root of 250532640 is about 630.4075971582.

Adding to 250532640 its reverse (46235052), we get a palindrome (296767692).

The spelling of 250532640 in words is "two hundred fifty million, five hundred thirty-two thousand, six hundred forty".