22163388 has 48 divisors (see below), whose sum is σ = 57501696. Its totient is φ = 6598080.

The previous prime is 22163377. The next prime is 22163413. The reversal of 22163388 is 88336122.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 2545 + ... + 7127.

It is an arithmetic number, because the mean of its divisors is an integer number (1197952).

Almost surely, 2^22163388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22163388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28750848).

22163388 is an abundant number, since it is smaller than the sum of its proper divisors (35338308).

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

22163388 is a wasteful number, since it uses less digits than its factorization.

22163388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4634 (or 4632 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 22163388 is about 4707.8007604401. The cubic root of 22163388 is about 280.8958889568.

The spelling of 22163388 in words is "twenty-two million, one hundred sixty-three thousand, three hundred eighty-eight".