22722288 has 20 divisors (see below), whose sum is σ = 58699368. Its totient is φ = 7574080.

The previous prime is 22722263. The next prime is 22722299. The reversal of 22722288 is 88222722.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236643 + ... + 236738.

Almost surely, 2^22722288 is an apocalyptic number.

It is an amenable number.

22722288 is an abundant number, since it is smaller than the sum of its proper divisors (35977080).

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

22722288 is a wasteful number, since it uses less digits than its factorization.

22722288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473392 (or 473386 counting only the distinct ones).

The product of its digits is 14336, while the sum is 33.

The square root of 22722288 is about 4766.7901149516. The cubic root of 22722288 is about 283.2374571414.

It can be divided in two parts, 2272 and 2288, that added together give a triangular number (4560 = T₉₅).

The spelling of 22722288 in words is "twenty-two million, seven hundred twenty-two thousand, two hundred eighty-eight".