22915830 has 128 divisors (see below), whose sum is σ = 68428800. Its totient is φ = 4892160.

The previous prime is 22915819. The next prime is 22915859. The reversal of 22915830 is 3851922.

It is a happy number.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 174865 + ... + 174995.

It is an arithmetic number, because the mean of its divisors is an integer number (534600).

Almost surely, 2^22915830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22915830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34214400).

22915830 is an abundant number, since it is smaller than the sum of its proper divisors (45512970).

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

22915830 is a wasteful number, since it uses less digits than its factorization.

22915830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 22915830 is about 4787.0481510008. The cubic root of 22915830 is about 284.0393633860.

The spelling of 22915830 in words is "twenty-two million, nine hundred fifteen thousand, eight hundred thirty".