22770688 has 44 divisors (see below), whose sum is σ = 46827172. Its totient is φ = 11059200.

The previous prime is 22770679. The next prime is 22770689. The reversal of 22770688 is 88607722.

It can be written as a sum of positive squares in 2 ways, for example, as 19784704 + 2985984 = 4448^2 + 1728^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22770688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22770689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37588 + ... + 38188.

Almost surely, 2^22770688 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 22770688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23413586).

22770688 is an abundant number, since it is smaller than the sum of its proper divisors (24056484).

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

22770688 is an equidigital number, since it uses as much as digits as its factorization.

22770688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 22770688 is about 4771.8642059472. The cubic root of 22770688 is about 283.4384194586.

The spelling of 22770688 in words is "twenty-two million, seven hundred seventy thousand, six hundred eighty-eight".