249398940 has 96 divisors (see below), whose sum is σ = 840107520. Its totient is φ = 54003456.

The previous prime is 249398911. The next prime is 249398951. The reversal of 249398940 is 49893942.

It is a self number, because there is not a number n which added to its sum of digits gives 249398940.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7647 + ... + 23606.

It is an arithmetic number, because the mean of its divisors is an integer number (8751120).

Almost surely, 2^249398940 is an apocalyptic number.

249398940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249398940 is an abundant number, since it is smaller than the sum of its proper divisors (590708580).

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

249398940 is a wasteful number, since it uses less digits than its factorization.

249398940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31291 (or 31289 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 249398940 is about 15792.3696765242. The cubic root of 249398940 is about 629.4552610414.

The spelling of 249398940 in words is "two hundred forty-nine million, three hundred ninety-eight thousand, nine hundred forty".