51778734 has 32 divisors (see below), whose sum is σ = 118817280. Its totient is φ = 14735712.

The previous prime is 51778729. The next prime is 51778801. The reversal of 51778734 is 43787715.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9007 + ... + 13589.

It is an arithmetic number, because the mean of its divisors is an integer number (3713040).

Almost surely, 2^51778734 is an apocalyptic number.

51778734 is an abundant number, since it is smaller than the sum of its proper divisors (67038546).

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

51778734 is a wasteful number, since it uses less digits than its factorization.

51778734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4864.

The product of its digits is 164640, while the sum is 42.

The square root of 51778734 is about 7195.7441588761. The cubic root of 51778734 is about 372.7209541481.

The spelling of 51778734 in words is "fifty-one million, seven hundred seventy-eight thousand, seven hundred thirty-four".