51788320 has 48 divisors (see below), whose sum is σ = 124201728. Its totient is φ = 20401920.

The previous prime is 51788311. The next prime is 51788351. The reversal of 51788320 is 2388715.

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, 8305 + ... + 13135.

It is an arithmetic number, because the mean of its divisors is an integer number (2587536).

Almost surely, 2^51788320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51788320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62100864).

51788320 is an abundant number, since it is smaller than the sum of its proper divisors (72413408).

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

51788320 is a wasteful number, since it uses less digits than its factorization.

51788320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4913 (or 4905 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 51788320 is about 7196.4102162120. The cubic root of 51788320 is about 372.7439538259.

The spelling of 51788320 in words is "fifty-one million, seven hundred eighty-eight thousand, three hundred twenty".