22813236 has 72 divisors (see below), whose sum is σ = 59928960. Its totient is φ = 7312896.

The previous prime is 22813229. The next prime is 22813237. The reversal of 22813236 is 63231822.

Its product of digits (3456) is a multiple of the sum of its prime divisors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22813237) 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, 164055 + ... + 164193.

Almost surely, 2^22813236 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 22813236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29964480).

22813236 is an abundant number, since it is smaller than the sum of its proper divisors (37115724).

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

22813236 is a wasteful number, since it uses less digits than its factorization.

22813236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 288 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 22813236 is about 4776.3203410157. The cubic root of 22813236 is about 283.6148485339.

The spelling of 22813236 in words is "twenty-two million, eight hundred thirteen thousand, two hundred thirty-six".