22002090 has 64 divisors (see below), whose sum is σ = 58603392. Its totient is φ = 5241600.

The previous prime is 22002077. The next prime is 22002107. The reversal of 22002090 is 9020022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19584 + ... + 20676.

It is an arithmetic number, because the mean of its divisors is an integer number (915678).

Almost surely, 2^22002090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22002090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29301696).

22002090 is an abundant number, since it is smaller than the sum of its proper divisors (36601302).

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

22002090 is a wasteful number, since it uses less digits than its factorization.

22002090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 22002090 is about 4690.6385492809. The cubic root of 22002090 is about 280.2128059091.

The spelling of 22002090 in words is "twenty-two million, two thousand, ninety".