22788261 has 12 divisors (see below), whose sum is σ = 33334080. Its totient is φ = 14999400.

The previous prime is 22788247. The next prime is 22788281. The reversal of 22788261 is 16288722.

It is a happy number.

It is not a de Polignac number, because 22788261 - 2⁹ = 22787749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22788221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15315 + ... + 16736.

It is an arithmetic number, because the mean of its divisors is an integer number (2777840).

Almost surely, 2^22788261 is an apocalyptic number.

It is an amenable number.

22788261 is a deficient number, since it is larger than the sum of its proper divisors (10545819).

22788261 is a wasteful number, since it uses less digits than its factorization.

22788261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32136 (or 32133 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 22788261 is about 4773.7051647541. The cubic root of 22788261 is about 283.5113140880.

It can be divided in two parts, 227 and 88261, that added together give a palindrome (88488).

The spelling of 22788261 in words is "twenty-two million, seven hundred eighty-eight thousand, two hundred sixty-one".