22055880 has 288 divisors, whose sum is σ = 87333120. Its totient is φ = 4435200.

The previous prime is 22055867. The next prime is 22055893. The reversal of 22055880 is 8855022.

It is an interprime number because it is at equal distance from previous prime (22055867) and next prime (22055893).

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 711465 + ... + 711495.

It is an arithmetic number, because the mean of its divisors is an integer number (303240).

Almost surely, 2^22055880 is an apocalyptic number.

22055880 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 22055880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43666560).

22055880 is an abundant number, since it is smaller than the sum of its proper divisors (65277240).

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

22055880 is a wasteful number, since it uses less digits than its factorization.

22055880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 22055880 is about 4696.3688100489. The cubic root of 22055880 is about 280.4409718159.

The spelling of 22055880 in words is "twenty-two million, fifty-five thousand, eight hundred eighty".