22821880 has 16 divisors (see below), whose sum is σ = 51349320. Its totient is φ = 9128736.

The previous prime is 22821847. The next prime is 22821901. The reversal of 22821880 is 8812822.

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, 285234 + ... + 285313.

Almost surely, 2^22821880 is an apocalyptic number.

22821880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22821880 is an abundant number, since it is smaller than the sum of its proper divisors (28527440).

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

22821880 is a wasteful number, since it uses less digits than its factorization.

22821880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570558 (or 570554 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 22821880 is about 4777.2251359968. The cubic root of 22821880 is about 283.6506648349.

The spelling of 22821880 in words is "twenty-two million, eight hundred twenty-one thousand, eight hundred eighty".