22916556 has 72 divisors (see below), whose sum is σ = 65126880. Its totient is φ = 6741504.

The previous prime is 22916519. The next prime is 22916563. The reversal of 22916556 is 65561922.

It is a super-2 number, since 2×22916556² = 1050337077802272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 22916556.

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, 9700 + ... + 11828.

It is an arithmetic number, because the mean of its divisors is an integer number (904540).

Almost surely, 2^22916556 is an apocalyptic number.

22916556 is a gapful number since it is divisible by the number (26) 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 22916556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32563440).

22916556 is an abundant number, since it is smaller than the sum of its proper divisors (42210324).

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

22916556 is a wasteful number, since it uses less digits than its factorization.

22916556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175 (or 2170 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 22916556 is about 4787.1239800114. The cubic root of 22916556 is about 284.0423629195.

The spelling of 22916556 in words is "twenty-two million, nine hundred sixteen thousand, five hundred fifty-six".