22056870 has 64 divisors (see below), whose sum is σ = 58475520. Its totient is φ = 5280000.

The previous prime is 22056823. The next prime is 22056883. The reversal of 22056870 is 7865022.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 28995 + ... + 29745.

It is an arithmetic number, because the mean of its divisors is an integer number (913680).

Almost surely, 2^22056870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22056870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29237760).

22056870 is an abundant number, since it is smaller than the sum of its proper divisors (36418650).

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

22056870 is a wasteful number, since it uses less digits than its factorization.

22056870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 22056870 is about 4696.4742094469. The cubic root of 22056870 is about 280.4451677099.

The spelling of 22056870 in words is "twenty-two million, fifty-six thousand, eight hundred seventy".