22685990 has 16 divisors (see below), whose sum is σ = 43237152. Its totient is φ = 8540544.

The previous prime is 22685989. The next prime is 22686049. The reversal of 22685990 is 9958622.

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 7 ways as a sum of consecutive naturals, for example, 66554 + ... + 66893.

It is an arithmetic number, because the mean of its divisors is an integer number (2702322).

Almost surely, 2^22685990 is an apocalyptic number.

22685990 is a deficient number, since it is larger than the sum of its proper divisors (20551162).

22685990 is a wasteful number, since it uses less digits than its factorization.

22685990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133471.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 22685990 is about 4762.9812092848. The cubic root of 22685990 is about 283.0865563670.

The spelling of 22685990 in words is "twenty-two million, six hundred eighty-five thousand, nine hundred ninety".