51793440 has 48 divisors (see below), whose sum is σ = 163150848. Its totient is φ = 13811456.

The previous prime is 51793439. The next prime is 51793459. The reversal of 51793440 is 4439715.

It is a tau number, because it is divible by the number of its divisors (48).

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, 53472 + ... + 54431.

It is an arithmetic number, because the mean of its divisors is an integer number (3398976).

Almost surely, 2^51793440 is an apocalyptic number.

It is an amenable number.

51793440 is an abundant number, since it is smaller than the sum of its proper divisors (111357408).

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

51793440 is a wasteful number, since it uses less digits than its factorization.

51793440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107921 (or 107913 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 51793440 is about 7196.7659403374. The cubic root of 51793440 is about 372.7562370728.

The spelling of 51793440 in words is "fifty-one million, seven hundred ninety-three thousand, four hundred forty".