22159788 has 48 divisors (see below), whose sum is σ = 59345664. Its totient is φ = 6304320.

The previous prime is 22159783. The next prime is 22159801. The reversal of 22159788 is 88795122.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (22159783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27406 + ... + 28202.

It is an arithmetic number, because the mean of its divisors is an integer number (1236368).

Almost surely, 2^22159788 is an apocalyptic number.

22159788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22159788 is an abundant number, since it is smaller than the sum of its proper divisors (37185876).

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

22159788 is a wasteful number, since it uses less digits than its factorization.

22159788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1140 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 22159788 is about 4707.4184007798. The cubic root of 22159788 is about 280.8806794898.

The spelling of 22159788 in words is "twenty-two million, one hundred fifty-nine thousand, seven hundred eighty-eight".