22725090 has 64 divisors (see below), whose sum is σ = 64177920. Its totient is φ = 5702400.

The previous prime is 22725023. The next prime is 22725097. The reversal of 22725090 is 9052722.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22725097) 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, 2115 + ... + 7065.

It is an arithmetic number, because the mean of its divisors is an integer number (1002780).

Almost surely, 2^22725090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22725090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32088960).

22725090 is an abundant number, since it is smaller than the sum of its proper divisors (41452830).

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

22725090 is a wasteful number, since it uses less digits than its factorization.

22725090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984 (or 4978 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 22725090 is about 4767.0840143635. The cubic root of 22725090 is about 283.2490991429.

The spelling of 22725090 in words is "twenty-two million, seven hundred twenty-five thousand, ninety".