51979388 has 12 divisors (see below), whose sum is σ = 91032480. Its totient is φ = 25970112.

The previous prime is 51979373. The next prime is 51979391. The reversal of 51979388 is 88397915.

It is a congruent number.

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, 2228 + ... + 10436.

It is an arithmetic number, because the mean of its divisors is an integer number (7586040).

Almost surely, 2^51979388 is an apocalyptic number.

It is an amenable number.

51979388 is a deficient number, since it is larger than the sum of its proper divisors (39053092).

51979388 is a wasteful number, since it uses less digits than its factorization.

51979388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9796 (or 9794 counting only the distinct ones).

The product of its digits is 544320, while the sum is 50.

The square root of 51979388 is about 7209.6732242176. The cubic root of 51979388 is about 373.2017921641.

The spelling of 51979388 in words is "fifty-one million, nine hundred seventy-nine thousand, three hundred eighty-eight".