51392978 has 32 divisors (see below), whose sum is σ = 97950720. Its totient is φ = 19673280.

The previous prime is 51392977. The next prime is 51392993. The reversal of 51392978 is 87929315.

It is not an unprimeable number, because it can be changed into a prime (51392977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1088 + ... + 10196.

It is an arithmetic number, because the mean of its divisors is an integer number (3060960).

Almost surely, 2^51392978 is an apocalyptic number.

51392978 is a deficient number, since it is larger than the sum of its proper divisors (46557742).

51392978 is a wasteful number, since it uses less digits than its factorization.

51392978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9162.

The product of its digits is 136080, while the sum is 44.

The square root of 51392978 is about 7168.8895932355. The cubic root of 51392978 is about 371.7930449815.

The spelling of 51392978 in words is "fifty-one million, three hundred ninety-two thousand, nine hundred seventy-eight".