22947858 has 48 divisors (see below), whose sum is σ = 55429920. Its totient is φ = 6818688.

The previous prime is 22947857. The next prime is 22947871. The reversal of 22947858 is 85874922.

It is not an unprimeable number, because it can be changed into a prime (22947851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3841 + ... + 7787.

It is an arithmetic number, because the mean of its divisors is an integer number (1154790).

Almost surely, 2^22947858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22947858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27714960).

22947858 is an abundant number, since it is smaller than the sum of its proper divisors (32482062).

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

22947858 is a wasteful number, since it uses less digits than its factorization.

22947858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991 (or 3988 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 22947858 is about 4790.3922595128. The cubic root of 22947858 is about 284.1716297105.

The spelling of 22947858 in words is "twenty-two million, nine hundred forty-seven thousand, eight hundred fifty-eight".