51769720 has 32 divisors (see below), whose sum is σ = 116712720. Its totient is φ = 20666880.

The previous prime is 51769693. The next prime is 51769733. The reversal of 51769720 is 2796715.

It is a self number, because there is not a number n which added to its sum of digits gives 51769720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26704 + ... + 28576.

Almost surely, 2^51769720 is an apocalyptic number.

It is an amenable number.

51769720 is an abundant number, since it is smaller than the sum of its proper divisors (64943000).

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

51769720 is a wasteful number, since it uses less digits than its factorization.

51769720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575 (or 2571 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 51769720 is about 7195.1177891679. The cubic root of 51769720 is about 372.6993242794.

The spelling of 51769720 in words is "fifty-one million, seven hundred sixty-nine thousand, seven hundred twenty".