22428690 has 32 divisors (see below), whose sum is σ = 54043200. Its totient is φ = 5957184.

The previous prime is 22428643. The next prime is 22428709. The reversal of 22428690 is 9682422.

It is a super-2 number, since 2×22428690² = 1006092270232200, which contains 22 as substring.

It is a Curzon 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, 6961 + ... + 9659.

It is an arithmetic number, because the mean of its divisors is an integer number (1688850).

Almost surely, 2^22428690 is an apocalyptic number.

22428690 is an abundant number, since it is smaller than the sum of its proper divisors (31614510).

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

22428690 is a wasteful number, since it uses less digits than its factorization.

22428690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 22428690 is about 4735.8937910388. The cubic root of 22428690 is about 282.0122473429.

The spelling of 22428690 in words is "twenty-two million, four hundred twenty-eight thousand, six hundred ninety".