51692840 has 32 divisors (see below), whose sum is σ = 117170280. Its totient is φ = 20524032.

The previous prime is 51692827. The next prime is 51692843. The reversal of 51692840 is 4829615.

It can be written as a sum of positive squares in 4 ways, for example, as 46594276 + 5098564 = 6826^2 + 2258^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51692840.

It is not an unprimeable number, because it can be changed into a prime (51692843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764 + ... + 10196.

Almost surely, 2^51692840 is an apocalyptic number.

It is an amenable number.

51692840 is an abundant number, since it is smaller than the sum of its proper divisors (65477440).

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

51692840 is a wasteful number, since it uses less digits than its factorization.

51692840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9581 (or 9577 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 51692840 is about 7189.7732926706. The cubic root of 51692840 is about 372.5147419957.

The spelling of 51692840 in words is "fifty-one million, six hundred ninety-two thousand, eight hundred forty".