22558890 has 48 divisors (see below), whose sum is σ = 57168288. Its totient is φ = 5696352.

The previous prime is 22558873. The next prime is 22558927. The reversal of 22558890 is 9885522.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9789 + ... + 11871.

It is an arithmetic number, because the mean of its divisors is an integer number (1191006).

Almost surely, 2^22558890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22558890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28584144).

22558890 is an abundant number, since it is smaller than the sum of its proper divisors (34609398).

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

22558890 is a wasteful number, since it uses less digits than its factorization.

22558890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131 (or 2112 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 22558890 is about 4749.6199847988. The cubic root of 22558890 is about 282.5568945893.

The spelling of 22558890 in words is "twenty-two million, five hundred fifty-eight thousand, eight hundred ninety".