22445490 has 16 divisors (see below), whose sum is σ = 53869248. Its totient is φ = 5985456.

The previous prime is 22445483. The next prime is 22445503. The reversal of 22445490 is 9454422.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 748183 = 22445490 / (2 + 2 + 4 + 4 + 5 + 4 + 9 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374062 + ... + 374121.

It is an arithmetic number, because the mean of its divisors is an integer number (3366828).

Almost surely, 2^22445490 is an apocalyptic number.

22445490 is an abundant number, since it is smaller than the sum of its proper divisors (31423758).

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

22445490 is a wasteful number, since it uses less digits than its factorization.

22445490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748193.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 22445490 is about 4737.6671474471. The cubic root of 22445490 is about 282.0826426463.

The spelling of 22445490 in words is "twenty-two million, four hundred forty-five thousand, four hundred ninety".