51728887 has 16 divisors (see below), whose sum is σ = 62726400. Its totient is φ = 41670720.

The previous prime is 51728881. The next prime is 51728917. The reversal of 51728887 is 78882715.

It is a happy number.

It is not a de Polignac number, because 51728887 - 2³ = 51728879 is a prime.

It is a super-3 number, since 3×51728887³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51728881) 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, 15939 + ... + 18907.

It is an arithmetic number, because the mean of its divisors is an integer number (3920400).

Almost surely, 2^51728887 is an apocalyptic number.

51728887 is a deficient number, since it is larger than the sum of its proper divisors (10997513).

51728887 is a wasteful number, since it uses less digits than its factorization.

51728887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3126.

The product of its digits is 250880, while the sum is 46.

The square root of 51728887 is about 7192.2796803239. The cubic root of 51728887 is about 372.6013105215.

The spelling of 51728887 in words is "fifty-one million, seven hundred twenty-eight thousand, eight hundred eighty-seven".