22815280 has 20 divisors (see below), whose sum is σ = 53045712. Its totient is φ = 9126080.

The previous prime is 22815263. The next prime is 22815283. The reversal of 22815280 is 8251822.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (22815283) 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, 142516 + ... + 142675.

Almost surely, 2^22815280 is an apocalyptic number.

22815280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22815280 is an abundant number, since it is smaller than the sum of its proper divisors (30230432).

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

22815280 is a wasteful number, since it uses less digits than its factorization.

22815280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285204 (or 285198 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 22815280 is about 4776.5343084709. The cubic root of 22815280 is about 283.6233186378.

The spelling of 22815280 in words is "twenty-two million, eight hundred fifteen thousand, two hundred eighty".