51978984 has 32 divisors (see below), whose sum is σ = 136788000. Its totient is φ = 16414272.

The previous prime is 51978977. The next prime is 51979001. The reversal of 51978984 is 48987915.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56539 + ... + 57450.

It is an arithmetic number, because the mean of its divisors is an integer number (4274625).

Almost surely, 2^51978984 is an apocalyptic number.

It is an amenable number.

51978984 is an abundant number, since it is smaller than the sum of its proper divisors (84809016).

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

51978984 is a wasteful number, since it uses less digits than its factorization.

51978984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114017 (or 114013 counting only the distinct ones).

The product of its digits is 725760, while the sum is 51.

The square root of 51978984 is about 7209.6452062497. The cubic root of 51978984 is about 373.2008252814.

The spelling of 51978984 in words is "fifty-one million, nine hundred seventy-eight thousand, nine hundred eighty-four".