22208790 has 32 divisors (see below), whose sum is σ = 54036576. Its totient is φ = 5840640.

The previous prime is 22208779. The next prime is 22208801. The reversal of 22208790 is 9780222.

It is an interprime number because it is at equal distance from previous prime (22208779) and next prime (22208801).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2881 + ... + 7260.

It is an arithmetic number, because the mean of its divisors is an integer number (1688643).

Almost surely, 2^22208790 is an apocalyptic number.

22208790 is an abundant number, since it is smaller than the sum of its proper divisors (31827786).

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

22208790 is a wasteful number, since it uses less digits than its factorization.

22208790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10224.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 22208790 is about 4712.6202902419. The cubic root of 22208790 is about 281.0875644753.

The spelling of 22208790 in words is "twenty-two million, two hundred eight thousand, seven hundred ninety".