22865780 has 24 divisors (see below), whose sum is σ = 54878208. Its totient is φ = 7839648.

The previous prime is 22865771. The next prime is 22865783. The reversal of 22865780 is 8756822.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22865783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81524 + ... + 81803.

It is an arithmetic number, because the mean of its divisors is an integer number (2286592).

Almost surely, 2^22865780 is an apocalyptic number.

22865780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22865780 is an abundant number, since it is smaller than the sum of its proper divisors (32012428).

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

22865780 is a wasteful number, since it uses less digits than its factorization.

22865780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163343 (or 163341 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 22865780 is about 4781.8176460421. The cubic root of 22865780 is about 283.8324244496.

The spelling of 22865780 in words is "twenty-two million, eight hundred sixty-five thousand, seven hundred eighty".