22087912 has 64 divisors (see below), whose sum is σ = 53913600. Its totient is φ = 8226240.

The previous prime is 22087907. The next prime is 22087943. The reversal of 22087912 is 21978022.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13389 + ... + 14947.

It is an arithmetic number, because the mean of its divisors is an integer number (842400).

Almost surely, 2^22087912 is an apocalyptic number.

22087912 is a gapful number since it is divisible by the number (22) 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 22087912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26956800).

22087912 is an abundant number, since it is smaller than the sum of its proper divisors (31825688).

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

22087912 is a wasteful number, since it uses less digits than its factorization.

22087912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606 (or 1602 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 22087912 is about 4699.7778670912. Note that the first 3 decimals coincide. The cubic root of 22087912 is about 280.5766686606.

The spelling of 22087912 in words is "twenty-two million, eighty-seven thousand, nine hundred twelve".