22781088 has 240 divisors, whose sum is σ = 79035264. Its totient is φ = 6359040.

The previous prime is 22781081. The next prime is 22781089. The reversal of 22781088 is 88018722.

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

It is not an unprimeable number, because it can be changed into a prime (22781081) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 484681 + ... + 484727.

Almost surely, 2^22781088 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 22781088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39517632).

22781088 is an abundant number, since it is smaller than the sum of its proper divisors (56254176).

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

22781088 is a wasteful number, since it uses less digits than its factorization.

22781088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 22781088 is about 4772.9538024163. The cubic root of 22781088 is about 283.4815642669.

The spelling of 22781088 in words is "twenty-two million, seven hundred eighty-one thousand, eighty-eight".