249840256 has 32 divisors (see below), whose sum is σ = 498611700. Its totient is φ = 124698624.

The previous prime is 249840229. The next prime is 249840271. The reversal of 249840256 is 652048942.

It can be written as a sum of positive squares in 2 ways, for example, as 249134656 + 705600 = 15784^2 + 840^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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, 89376 + ... + 92128.

Almost surely, 2^249840256 is an apocalyptic number.

It is an amenable number.

249840256 is a deficient number, since it is larger than the sum of its proper divisors (248771444).

249840256 is an equidigital number, since it uses as much as digits as its factorization.

249840256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476 (or 3464 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 249840256 is about 15806.3359448039. The cubic root of 249840256 is about 629.8263198066.

The spelling of 249840256 in words is "two hundred forty-nine million, eight hundred forty thousand, two hundred fifty-six".