56720052 has 18 divisors (see below), whose sum is σ = 143375778. Its totient is φ = 18906672.

The previous prime is 56720033. The next prime is 56720101. The reversal of 56720052 is 25002765.

It can be written as a sum of positive squares in only one way, i.e., 53056656 + 3663396 = 7284^2 + 1914^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 56719998 and 56720025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 787743 + ... + 787814.

It is an arithmetic number, because the mean of its divisors is an integer number (7965321).

Almost surely, 2^56720052 is an apocalyptic number.

It is an amenable number.

56720052 is an abundant number, since it is smaller than the sum of its proper divisors (86655726).

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

56720052 is a wasteful number, since it uses less digits than its factorization.

56720052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575567 (or 1575562 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 56720052 is about 7531.2716057781. The cubic root of 56720052 is about 384.2190319424.

The spelling of 56720052 in words is "fifty-six million, seven hundred twenty thousand, fifty-two".