51798720 has 112 divisors (see below), whose sum is σ = 166786560. Its totient is φ = 13618176.

The previous prime is 51798713. The next prime is 51798749. The reversal of 51798720 is 2789715.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75499 + ... + 76181.

Almost surely, 2^51798720 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 51798720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83393280).

51798720 is an abundant number, since it is smaller than the sum of its proper divisors (114987840).

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

51798720 is a wasteful number, since it uses less digits than its factorization.

51798720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 51798720 is about 7197.1327624270. The cubic root of 51798720 is about 372.7689033233.

The spelling of 51798720 in words is "fifty-one million, seven hundred ninety-eight thousand, seven hundred twenty".