22465290 has 48 divisors (see below), whose sum is σ = 55514592. Its totient is φ = 5818176.

The previous prime is 22465271. The next prime is 22465349. The reversal of 22465290 is 9256422.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40797 + ... + 41343.

It is an arithmetic number, because the mean of its divisors is an integer number (1156554).

Almost surely, 2^22465290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22465290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27757296).

22465290 is an abundant number, since it is smaller than the sum of its proper divisors (33049302).

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

22465290 is a wasteful number, since it uses less digits than its factorization.

22465290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 22465290 is about 4739.7563228504. The cubic root of 22465290 is about 282.1655634590.

The spelling of 22465290 in words is "twenty-two million, four hundred sixty-five thousand, two hundred ninety".