22605090 has 48 divisors (see below), whose sum is σ = 56925504. Its totient is φ = 5734080.

The previous prime is 22605071. The next prime is 22605091. The reversal of 22605090 is 9050622.

It is a super-4 number, since 4×22605090⁴ (a number of 31 digits) contains 4444 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22605090.

It is not an unprimeable number, because it can be changed into a prime (22605091) 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, 124800 + ... + 124980.

It is an arithmetic number, because the mean of its divisors is an integer number (1185948).

Almost surely, 2^22605090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22605090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28462752).

22605090 is an abundant number, since it is smaller than the sum of its proper divisors (34320414).

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

22605090 is a wasteful number, since it uses less digits than its factorization.

22605090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 22605090 is about 4754.4810442361. The cubic root of 22605090 is about 282.7496527016.

The spelling of 22605090 in words is "twenty-two million, six hundred five thousand, ninety".