51872436 has 72 divisors (see below), whose sum is σ = 163485504. Its totient is φ = 13472640.

The previous prime is 51872411. The next prime is 51872449. The reversal of 51872436 is 63427815.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51872436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6585 + ... + 12128.

It is an arithmetic number, because the mean of its divisors is an integer number (2270632).

Almost surely, 2^51872436 is an apocalyptic number.

It is an amenable number.

51872436 is an abundant number, since it is smaller than the sum of its proper divisors (111613068).

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

51872436 is a wasteful number, since it uses less digits than its factorization.

51872436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18741 (or 18736 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 51872436 is about 7202.2521477660. The cubic root of 51872436 is about 372.9456516253.

The spelling of 51872436 in words is "fifty-one million, eight hundred seventy-two thousand, four hundred thirty-six".