22158396 has 72 divisors (see below), whose sum is σ = 60999120. Its totient is φ = 6741504.

The previous prime is 22158391. The next prime is 22158401. The reversal of 22158396 is 69385122.

It is an interprime number because it is at equal distance from previous prime (22158391) and next prime (22158401).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 22158396.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22158391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52675 + ... + 53093.

It is an arithmetic number, because the mean of its divisors is an integer number (847210).

Almost surely, 2^22158396 is an apocalyptic number.

22158396 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22158396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30499560).

22158396 is an abundant number, since it is smaller than the sum of its proper divisors (38840724).

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

22158396 is a wasteful number, since it uses less digits than its factorization.

22158396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 550 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 22158396 is about 4707.2705467181. The cubic root of 22158396 is about 280.8747980543.

The spelling of 22158396 in words is "twenty-two million, one hundred fifty-eight thousand, three hundred ninety-six".