251828940 has 48 divisors (see below), whose sum is σ = 769224960. Its totient is φ = 61049280.

The previous prime is 251828911. The next prime is 251828959. The reversal of 251828940 is 49828152.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190120 + ... + 191439.

It is an arithmetic number, because the mean of its divisors is an integer number (16025520).

Almost surely, 2^251828940 is an apocalyptic number.

251828940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251828940 is an abundant number, since it is smaller than the sum of its proper divisors (517396020).

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

251828940 is a wasteful number, since it uses less digits than its factorization.

251828940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381582 (or 381580 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 251828940 is about 15869.1190681777. The cubic root of 251828940 is about 631.4930072466.

The spelling of 251828940 in words is "two hundred fifty-one million, eight hundred twenty-eight thousand, nine hundred forty".