51278928 has 20 divisors (see below), whose sum is σ = 132470688. Its totient is φ = 17092960.

The previous prime is 51278911. The next prime is 51278933. The reversal of 51278928 is 82987215.

It is a self number, because there is not a number n which added to its sum of digits gives 51278928.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534108 + ... + 534203.

Almost surely, 2^51278928 is an apocalyptic number.

It is an amenable number.

51278928 is an abundant number, since it is smaller than the sum of its proper divisors (81191760).

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

51278928 is a wasteful number, since it uses less digits than its factorization.

51278928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068322 (or 1068316 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 51278928 is about 7160.9306657724. The cubic root of 51278928 is about 371.5178167064.

The spelling of 51278928 in words is "fifty-one million, two hundred seventy-eight thousand, nine hundred twenty-eight".