249405696 has 72 divisors (see below), whose sum is σ = 737556960. Its totient is φ = 83132928.

The previous prime is 249405683. The next prime is 249405697. The reversal of 249405696 is 696504942.

249405696 is a `hidden beast` number, since 2 + 49 + 40 + 569 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (249405697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11130 + ... + 24953.

Almost surely, 2^249405696 is an apocalyptic number.

It is an amenable number.

249405696 is an abundant number, since it is smaller than the sum of its proper divisors (488151264).

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

249405696 is an equidigital number, since it uses as much as digits as its factorization.

249405696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36108 (or 36088 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 249405696 is about 15792.5835758434. The cubic root of 249405696 is about 629.4609447883.

The spelling of 249405696 in words is "two hundred forty-nine million, four hundred five thousand, six hundred ninety-six".