22166988 has 24 divisors (see below), whose sum is σ = 51879408. Its totient is φ = 7366656.

The previous prime is 22166983. The next prime is 22166993. The reversal of 22166988 is 88966122.

It is an interprime number because it is at equal distance from previous prime (22166983) and next prime (22166993).

It is not an unprimeable number, because it can be changed into a prime (22166983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1620 + ... + 6852.

It is an arithmetic number, because the mean of its divisors is an integer number (2161642).

Almost surely, 2^22166988 is an apocalyptic number.

It is an amenable number.

22166988 is an abundant number, since it is smaller than the sum of its proper divisors (29712420).

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

22166988 is a wasteful number, since it uses less digits than its factorization.

22166988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5593 (or 5591 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 22166988 is about 4708.1830890483. The cubic root of 22166988 is about 280.9110967769.

The spelling of 22166988 in words is "twenty-two million, one hundred sixty-six thousand, nine hundred eighty-eight".