51872728 has 32 divisors (see below), whose sum is σ = 102216960. Its totient is φ = 24631200.

The previous prime is 51872719. The next prime is 51872731. The reversal of 51872728 is 82727815.

51872728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 26851 + ... + 28717.

It is an arithmetic number, because the mean of its divisors is an integer number (3194280).

Almost surely, 2^51872728 is an apocalyptic number.

It is an amenable number.

51872728 is a deficient number, since it is larger than the sum of its proper divisors (50344232).

51872728 is a wasteful number, since it uses less digits than its factorization.

51872728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047 (or 2043 counting only the distinct ones).

The product of its digits is 62720, while the sum is 40.

The square root of 51872728 is about 7202.2724191744. The cubic root of 51872728 is about 372.9463514184.

The spelling of 51872728 in words is "fifty-one million, eight hundred seventy-two thousand, seven hundred twenty-eight".