51744320 has 56 divisors (see below), whose sum is σ = 124513848. Its totient is φ = 20480000.

The previous prime is 51744313. The next prime is 51744331. The reversal of 51744320 is 2344715.

It can be written as a sum of positive squares in 4 ways, for example, as 35808256 + 15936064 = 5984^2 + 3992^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51744320.

It is a congruent number.

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, 31520 + ... + 33120.

Almost surely, 2^51744320 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 51744320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62256924).

51744320 is an abundant number, since it is smaller than the sum of its proper divisors (72769528).

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

51744320 is a wasteful number, since it uses less digits than its factorization.

51744320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719 (or 1709 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 51744320 is about 7193.3524868451. The cubic root of 51744320 is about 372.6383612849.

The spelling of 51744320 in words is "fifty-one million, seven hundred forty-four thousand, three hundred twenty".