22205988 has 60 divisors (see below), whose sum is σ = 66350592. Its totient is φ = 6343920.

The previous prime is 22205987. The next prime is 22206047. The reversal of 22205988 is 88950222.

It is a super-2 number, since 2×22205988² = 986211806112288, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (22205983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2628 + ... + 7163.

Almost surely, 2^22205988 is an apocalyptic number.

22205988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22205988 is an abundant number, since it is smaller than the sum of its proper divisors (44144604).

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

22205988 is a wasteful number, since it uses less digits than its factorization.

22205988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9814 (or 9803 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 22205988 is about 4712.3229940232. The cubic root of 22205988 is about 281.0757427224.

The spelling of 22205988 in words is "twenty-two million, two hundred five thousand, nine hundred eighty-eight".