56621000 has 64 divisors (see below), whose sum is σ = 135822960. Its totient is φ = 22080000.

The previous prime is 56620987. The next prime is 56621011. The reversal of 56621000 is 12665.

It can be written as a sum of positive squares in 8 ways, for example, as 879844 + 55741156 = 938^2 + 7466^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 40310 + ... + 41690.

Almost surely, 2^56621000 is an apocalyptic number.

56621000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56621000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67911480).

56621000 is an abundant number, since it is smaller than the sum of its proper divisors (79201960).

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

56621000 is a wasteful number, since it uses less digits than its factorization.

56621000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443 (or 1429 counting only the distinct ones).

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

The square root of 56621000 is about 7524.6926847546. The cubic root of 56621000 is about 383.9952437200.

Adding to 56621000 its reverse (12665), we get a palindrome (56633665).

The spelling of 56621000 in words is "fifty-six million, six hundred twenty-one thousand".