22122864 has 60 divisors (see below), whose sum is σ = 62864776. Its totient is φ = 7261056.

The previous prime is 22122857. The next prime is 22122883. The reversal of 22122864 is 46822122.

It is a happy number.

It is a super-2 number, since 2×22122864² = 978842223124992, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8502 + ... + 10794.

Almost surely, 2^22122864 is an apocalyptic number.

22122864 is a gapful number since it is divisible by the number (24) 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 22122864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31432388).

22122864 is an abundant number, since it is smaller than the sum of its proper divisors (40741912).

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

22122864 is a wasteful number, since it uses less digits than its factorization.

22122864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374 (or 2365 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 22122864 is about 4703.4948708381. The cubic root of 22122864 is about 280.7245858794.

Adding to 22122864 its reverse (46822122), we get a palindrome (68944986).

The spelling of 22122864 in words is "twenty-two million, one hundred twenty-two thousand, eight hundred sixty-four".