22775820 has 24 divisors (see below), whose sum is σ = 63772464. Its totient is φ = 6073536.

The previous prime is 22775807. The next prime is 22775867. The reversal of 22775820 is 2857722.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189739 + ... + 189858.

It is an arithmetic number, because the mean of its divisors is an integer number (2657186).

Almost surely, 2^22775820 is an apocalyptic number.

22775820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22775820 is an abundant number, since it is smaller than the sum of its proper divisors (40996644).

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

22775820 is a wasteful number, since it uses less digits than its factorization.

22775820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379609 (or 379607 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 22775820 is about 4772.4019109878. The cubic root of 22775820 is about 283.4597114035.

The spelling of 22775820 in words is "twenty-two million, seven hundred seventy-five thousand, eight hundred twenty".