22818432 has 128 divisors (see below), whose sum is σ = 74712960. Its totient is φ = 6008832.

The previous prime is 22818431. The next prime is 22818473. The reversal of 22818432 is 23481822.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 22818432.

It is not an unprimeable number, because it can be changed into a prime (22818431) 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, 34618 + ... + 35270.

It is an arithmetic number, because the mean of its divisors is an integer number (583695).

Almost surely, 2^22818432 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 22818432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37356480).

22818432 is an abundant number, since it is smaller than the sum of its proper divisors (51894528).

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

22818432 is a wasteful number, since it uses less digits than its factorization.

22818432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 678 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 22818432 is about 4776.8642434132. The cubic root of 22818432 is about 283.6363791764.

The spelling of 22818432 in words is "twenty-two million, eight hundred eighteen thousand, four hundred thirty-two".