22881136 has 40 divisors (see below), whose sum is σ = 46809504. Its totient is φ = 10813440.

The previous prime is 22881127. The next prime is 22881137. The reversal of 22881136 is 63118822.

It is a junction number, because it is equal to n+sod(n) for n = 22881098 and 22881107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22881137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35376 + ... + 36016.

Almost surely, 2^22881136 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 22881136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23404752).

22881136 is an abundant number, since it is smaller than the sum of its proper divisors (23928368).

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

22881136 is a wasteful number, since it uses less digits than its factorization.

22881136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 763 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 22881136 is about 4783.4230421321. The cubic root of 22881136 is about 283.8959481283.

Adding to 22881136 its reverse (63118822), we get a palindrome (85999958).

The spelling of 22881136 in words is "twenty-two million, eight hundred eighty-one thousand, one hundred thirty-six".