22142988 has 36 divisors (see below), whose sum is σ = 63969360. Its totient is φ = 6326496.

The previous prime is 22142987. The next prime is 22143001. The reversal of 22142988 is 88924122.

22142988 is a `hidden beast` number, since 221 + 429 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 (22142987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43683 + ... + 44186.

Almost surely, 2^22142988 is an apocalyptic number.

22142988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22142988 is an abundant number, since it is smaller than the sum of its proper divisors (41826372).

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

22142988 is a wasteful number, since it uses less digits than its factorization.

22142988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87886 (or 87881 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 22142988 is about 4705.6336448984. The cubic root of 22142988 is about 280.8096801884.

The spelling of 22142988 in words is "twenty-two million, one hundred forty-two thousand, nine hundred eighty-eight".