51792240 has 40 divisors (see below), whose sum is σ = 160556688. Its totient is φ = 13811200.

The previous prime is 51792239. The next prime is 51792281. The reversal of 51792240 is 4229715.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×51792240² = 5364872248435200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51792198 and 51792207.

It is a congruent number.

It is an unprimeable number.

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, 107661 + ... + 108140.

Almost surely, 2^51792240 is an apocalyptic number.

It is an amenable number.

51792240 is an abundant number, since it is smaller than the sum of its proper divisors (108764448).

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

51792240 is a wasteful number, since it uses less digits than its factorization.

51792240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215817 (or 215811 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 51792240 is about 7196.6825690731. The cubic root of 51792240 is about 372.7533582594.

The spelling of 51792240 in words is "fifty-one million, seven hundred ninety-two thousand, two hundred forty".