56021706 has 48 divisors (see below), whose sum is σ = 135573984. Its totient is φ = 17235504.

The previous prime is 56021699. The next prime is 56021711. The reversal of 56021706 is 60712065.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 56021706.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1885 + ... + 10751.

It is an arithmetic number, because the mean of its divisors is an integer number (2824458).

Almost surely, 2^56021706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56021706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67786992).

56021706 is an abundant number, since it is smaller than the sum of its proper divisors (79552278).

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

56021706 is a wasteful number, since it uses less digits than its factorization.

56021706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8897 (or 8885 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 56021706 is about 7484.7649261684. The cubic root of 56021706 is about 382.6356612219.

The spelling of 56021706 in words is "fifty-six million, twenty-one thousand, seven hundred six".