56801720 has 64 divisors (see below), whose sum is σ = 138024000. Its totient is φ = 20973568.

The previous prime is 56801683. The next prime is 56801747. The reversal of 56801720 is 2710865.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

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, 25616 + ... + 27744.

It is an arithmetic number, because the mean of its divisors is an integer number (2156625).

Almost surely, 2^56801720 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 56801720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69012000).

56801720 is an abundant number, since it is smaller than the sum of its proper divisors (81222280).

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

56801720 is a wasteful number, since it uses less digits than its factorization.

56801720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192 (or 2188 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 56801720 is about 7536.6915818547. The cubic root of 56801720 is about 384.4033486043.

The spelling of 56801720 in words is "fifty-six million, eight hundred one thousand, seven hundred twenty".