22798881 has 32 divisors (see below), whose sum is σ = 39168000. Its totient is φ = 12836880.

The previous prime is 22798871. The next prime is 22798883. The reversal of 22798881 is 18889722.

It is a happy number.

It is not a de Polignac number, because 22798881 - 2⁷ = 22798753 is a prime.

It is a super-2 number, since 2×22798881² = 1039577949704322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22798883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12570 + ... + 14268.

It is an arithmetic number, because the mean of its divisors is an integer number (1224000).

Almost surely, 2^22798881 is an apocalyptic number.

22798881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22798881 is a deficient number, since it is larger than the sum of its proper divisors (16369119).

22798881 is a wasteful number, since it uses less digits than its factorization.

22798881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786 (or 1780 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 22798881 is about 4774.8173787068. The cubic root of 22798881 is about 283.5553487857. Note that the first 3 decimals are identical.

The spelling of 22798881 in words is "twenty-two million, seven hundred ninety-eight thousand, eight hundred eighty-one".