51868028 has 12 divisors (see below), whose sum is σ = 91863240. Its totient is φ = 25621392.

The previous prime is 51868027. The next prime is 51868039. The reversal of 51868028 is 82086815.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51867982 and 51868000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51868027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77783 + ... + 78446.

It is an arithmetic number, because the mean of its divisors is an integer number (7655270).

Almost surely, 2^51868028 is an apocalyptic number.

It is an amenable number.

51868028 is a deficient number, since it is larger than the sum of its proper divisors (39995212).

51868028 is a wasteful number, since it uses less digits than its factorization.

51868028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156316 (or 156314 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 51868028 is about 7201.9461258746. The cubic root of 51868028 is about 372.9350873055.

The spelling of 51868028 in words is "fifty-one million, eight hundred sixty-eight thousand, twenty-eight".