51428870 has 16 divisors (see below), whose sum is σ = 92845008. Its totient is φ = 20510880.

The previous prime is 51428863. The next prime is 51428879. The reversal of 51428870 is 7882415.

It is a self number, because there is not a number n which added to its sum of digits gives 51428870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51428879) by changing a digit.

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, 3941 + ... + 10880.

It is an arithmetic number, because the mean of its divisors is an integer number (5802813).

Almost surely, 2^51428870 is an apocalyptic number.

51428870 is a deficient number, since it is larger than the sum of its proper divisors (41416138).

51428870 is a wasteful number, since it uses less digits than its factorization.

51428870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15175.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 51428870 is about 7171.3924728744. The cubic root of 51428870 is about 371.8795761977.

The spelling of 51428870 in words is "fifty-one million, four hundred twenty-eight thousand, eight hundred seventy".