22393812 has 96 divisors (see below), whose sum is σ = 63608832. Its totient is φ = 5993856.

The previous prime is 22393757. The next prime is 22393823. The reversal of 22393812 is 21839322.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22393812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129358 + ... + 129530.

It is an arithmetic number, because the mean of its divisors is an integer number (662592).

Almost surely, 2^22393812 is an apocalyptic number.

22393812 is the 3864-th pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22393812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31804416).

22393812 is an abundant number, since it is smaller than the sum of its proper divisors (41215020).

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

22393812 is a wasteful number, since it uses less digits than its factorization.

22393812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 275 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 22393812 is about 4732.2100545094. The cubic root of 22393812 is about 281.8659893416.

The spelling of 22393812 in words is "twenty-two million, three hundred ninety-three thousand, eight hundred twelve".