51463728 has 40 divisors (see below), whose sum is σ = 147721200. Its totient is φ = 17154432.

The previous prime is 51463691. The next prime is 51463739. The reversal of 51463728 is 82736415.

51463728 is a `hidden beast` number, since 5 + 14 + 637 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51463692 and 51463701.

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, 59133 + ... + 59996.

It is an arithmetic number, because the mean of its divisors is an integer number (3693030).

Almost surely, 2^51463728 is an apocalyptic number.

It is an amenable number.

51463728 is an abundant number, since it is smaller than the sum of its proper divisors (96257472).

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

51463728 is a wasteful number, since it uses less digits than its factorization.

51463728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119146 (or 119134 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 51463728 is about 7173.8224120757. The cubic root of 51463728 is about 371.9635760383.

The spelling of 51463728 in words is "fifty-one million, four hundred sixty-three thousand, seven hundred twenty-eight".