22287880 has 16 divisors (see below), whose sum is σ = 50147820. Its totient is φ = 8915136.

The previous prime is 22287871. The next prime is 22287929. The reversal of 22287880 is 8878222.

It can be written as a sum of positive squares in 2 ways, for example, as 18438436 + 3849444 = 4294^2 + 1962^2 .

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, 278559 + ... + 278638.

Almost surely, 2^22287880 is an apocalyptic number.

22287880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22287880 is an abundant number, since it is smaller than the sum of its proper divisors (27859940).

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

22287880 is a wasteful number, since it uses less digits than its factorization.

22287880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557208 (or 557204 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 22287880 is about 4721.0041304790. The cubic root of 22287880 is about 281.4208390872.

The spelling of 22287880 in words is "twenty-two million, two hundred eighty-seven thousand, eight hundred eighty".