250013640 has 64 divisors (see below), whose sum is σ = 775915200. Its totient is φ = 64370432.

The previous prime is 250013639. The next prime is 250013681. The reversal of 250013640 is 46310052.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32442 + ... + 39401.

It is an arithmetic number, because the mean of its divisors is an integer number (12123675).

Almost surely, 2^250013640 is an apocalyptic number.

250013640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

250013640 is an abundant number, since it is smaller than the sum of its proper divisors (525901560).

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

250013640 is a wasteful number, since it uses less digits than its factorization.

250013640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71886 (or 71882 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 250013640 is about 15811.8196296315. The cubic root of 250013640 is about 629.9719816212.

Adding to 250013640 its reverse (46310052), we get a palindrome (296323692).

The spelling of 250013640 in words is "two hundred fifty million, thirteen thousand, six hundred forty".