51284388 has 24 divisors (see below), whose sum is σ = 124867008. Its totient is φ = 16351456.

The previous prime is 51284377. The next prime is 51284407. The reversal of 51284388 is 88348215.

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 7 ways as a sum of consecutive naturals, for example, 92631 + ... + 93182.

It is an arithmetic number, because the mean of its divisors is an integer number (5202792).

Almost surely, 2^51284388 is an apocalyptic number.

It is an amenable number.

51284388 is an abundant number, since it is smaller than the sum of its proper divisors (73582620).

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

51284388 is a wasteful number, since it uses less digits than its factorization.

51284388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185843 (or 185841 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 51284388 is about 7161.3118909876. The cubic root of 51284388 is about 371.5310022088.

The spelling of 51284388 in words is "fifty-one million, two hundred eighty-four thousand, three hundred eighty-eight".