51638304 has 24 divisors (see below), whose sum is σ = 135550800. Its totient is φ = 17212736.

The previous prime is 51638303. The next prime is 51638309. The reversal of 51638304 is 40383615.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (51638303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268854 + ... + 269045.

It is an arithmetic number, because the mean of its divisors is an integer number (5647950).

Almost surely, 2^51638304 is an apocalyptic number.

It is an amenable number.

51638304 is an abundant number, since it is smaller than the sum of its proper divisors (83912496).

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

51638304 is a wasteful number, since it uses less digits than its factorization.

51638304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537912 (or 537904 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 51638304 is about 7185.9796826877. The cubic root of 51638304 is about 372.3836947531.

The spelling of 51638304 in words is "fifty-one million, six hundred thirty-eight thousand, three hundred four".