56189640 has 128 divisors (see below), whose sum is σ = 183456000. Its totient is φ = 13685760.

The previous prime is 56189629. The next prime is 56189657. The reversal of 56189640 is 4698165.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 282261 + ... + 282459.

It is an arithmetic number, because the mean of its divisors is an integer number (1433250).

Almost surely, 2^56189640 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 56189640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91728000).

56189640 is an abundant number, since it is smaller than the sum of its proper divisors (127266360).

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

56189640 is a wasteful number, since it uses less digits than its factorization.

56189640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 56189640 is about 7495.9749199154. The cubic root of 56189640 is about 383.0176169615.

The spelling of 56189640 in words is "fifty-six million, one hundred eighty-nine thousand, six hundred forty".