251490468 has 24 divisors (see below), whose sum is σ = 592197760. Its totient is φ = 83060640.

The previous prime is 251490451. The next prime is 251490527. The reversal of 251490468 is 864094152.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94828 + ... + 97443.

Almost surely, 2^251490468 is an apocalyptic number.

It is an amenable number.

251490468 is an abundant number, since it is smaller than the sum of its proper divisors (340707292).

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

251490468 is a wasteful number, since it uses less digits than its factorization.

251490468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192387 (or 192385 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 251490468 is about 15858.4509962354. The cubic root of 251490468 is about 631.2099599084.

The spelling of 251490468 in words is "two hundred fifty-one million, four hundred ninety thousand, four hundred sixty-eight".