249409864 has 16 divisors (see below), whose sum is σ = 510156720. Its totient is φ = 113368080.

The previous prime is 249409837. The next prime is 249409877. The reversal of 249409864 is 468904942.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1417014 + ... + 1417189.

It is an arithmetic number, because the mean of its divisors is an integer number (31884795).

Almost surely, 2^249409864 is an apocalyptic number.

It is an amenable number.

249409864 is an abundant number, since it is smaller than the sum of its proper divisors (260746856).

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

249409864 is a wasteful number, since it uses less digits than its factorization.

249409864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834220 (or 2834216 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 249409864 is about 15792.7155359678. The cubic root of 249409864 is about 629.4644512287.

The spelling of 249409864 in words is "two hundred forty-nine million, four hundred nine thousand, eight hundred sixty-four".