22977891 has 8 divisors (see below), whose sum is σ = 34041360. Its totient is φ = 15318576.

The previous prime is 22977887. The next prime is 22977901. The reversal of 22977891 is 19877922.

It is not a de Polignac number, because 22977891 - 2² = 22977887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22977881) 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, 425490 + ... + 425543.

It is an arithmetic number, because the mean of its divisors is an integer number (4255170).

Almost surely, 2^22977891 is an apocalyptic number.

22977891 is a deficient number, since it is larger than the sum of its proper divisors (11063469).

22977891 is an equidigital number, since it uses as much as digits as its factorization.

22977891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851042 (or 851036 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 22977891 is about 4793.5259465241. The cubic root of 22977891 is about 284.2955455036.

The spelling of 22977891 in words is "twenty-two million, nine hundred seventy-seven thousand, eight hundred ninety-one".