56610020 has 12 divisors (see below), whose sum is σ = 118881084. Its totient is φ = 22644000.

The previous prime is 56610019. The next prime is 56610031. The reversal of 56610020 is 2001665.

It can be written as a sum of positive squares in 2 ways, for example, as 9193024 + 47416996 = 3032^2 + 6886^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2830501 = 56610020 / (5 + 6 + 6 + 1 + 0 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 56609974 and 56610001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415231 + ... + 1415270.

It is an arithmetic number, because the mean of its divisors is an integer number (9906757).

Almost surely, 2^56610020 is an apocalyptic number.

It is an amenable number.

56610020 is an abundant number, since it is smaller than the sum of its proper divisors (62271064).

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

56610020 is a wasteful number, since it uses less digits than its factorization.

56610020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830510 (or 2830508 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 56610020 is about 7523.9630514776. The cubic root of 56610020 is about 383.9704205370.

Adding to 56610020 its reverse (2001665), we get a palindrome (58611685).

The spelling of 56610020 in words is "fifty-six million, six hundred ten thousand, twenty".