22056840 has 128 divisors (see below), whose sum is σ = 79228800. Its totient is φ = 5425920.

The previous prime is 22056823. The next prime is 22056883. The reversal of 22056840 is 4865022.

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

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, 13255 + ... + 14825.

It is an arithmetic number, because the mean of its divisors is an integer number (618975).

Almost surely, 2^22056840 is an apocalyptic number.

22056840 is a gapful number since it is divisible by the number (20) 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 22056840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39614400).

22056840 is an abundant number, since it is smaller than the sum of its proper divisors (57171960).

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

22056840 is a wasteful number, since it uses less digits than its factorization.

22056840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 22056840 is about 4696.4710155605. The cubic root of 22056840 is about 280.4450405635.

It can be divided in two parts, 2205 and 6840, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 22056840 in words is "twenty-two million, fifty-six thousand, eight hundred forty".