249631268 has 6 divisors (see below), whose sum is σ = 436854726. Its totient is φ = 124815632.

The previous prime is 249631229. The next prime is 249631271. The reversal of 249631268 is 862136942.

It can be written as a sum of positive squares in only one way, i.e., 203689984 + 45941284 = 14272^2 + 6778^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31203905 + ... + 31203912.

It is an arithmetic number, because the mean of its divisors is an integer number (72809121).

Almost surely, 2^249631268 is an apocalyptic number.

It is an amenable number.

249631268 is a deficient number, since it is larger than the sum of its proper divisors (187223458).

249631268 is a wasteful number, since it uses less digits than its factorization.

249631268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62407821 (or 62407819 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 249631268 is about 15799.7236684696. The cubic root of 249631268 is about 629.6506570808.

The spelling of 249631268 in words is "two hundred forty-nine million, six hundred thirty-one thousand, two hundred sixty-eight".