56143620 has 72 divisors (see below), whose sum is σ = 183410136. Its totient is φ = 13819392.

The previous prime is 56143597. The next prime is 56143627. The reversal of 56143620 is 2634165.

56143620 is a `hidden beast` number, since 561 + 43 + 62 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3261636 + 52881984 = 1806^2 + 7272^2 .

It is not an unprimeable number, because it can be changed into a prime (56143627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9657 + ... + 14336.

It is an arithmetic number, because the mean of its divisors is an integer number (2547363).

Almost surely, 2^56143620 is an apocalyptic number.

It is an amenable number.

56143620 is an abundant number, since it is smaller than the sum of its proper divisors (127266516).

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

56143620 is a wasteful number, since it uses less digits than its factorization.

56143620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24021 (or 24016 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 56143620 is about 7492.9046437280. The cubic root of 56143620 is about 382.9130230362.

Adding to 56143620 its reverse (2634165), we get a palindrome (58777785).

The spelling of 56143620 in words is "fifty-six million, one hundred forty-three thousand, six hundred twenty".