22890639 has 4 divisors (see below), whose sum is σ = 30520856. Its totient is φ = 15260424.

The previous prime is 22890601. The next prime is 22890641. The reversal of 22890639 is 93609822.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22890639 - 2¹⁵ = 22857871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22890597 and 22890606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22090639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3815104 + ... + 3815109.

It is an arithmetic number, because the mean of its divisors is an integer number (7630214).

Almost surely, 2^22890639 is an apocalyptic number.

22890639 is a deficient number, since it is larger than the sum of its proper divisors (7630217).

22890639 is an equidigital number, since it uses as much as digits as its factorization.

22890639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7630216.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 22890639 is about 4784.4162653348. The cubic root of 22890639 is about 283.9352452708.

The spelling of 22890639 in words is "twenty-two million, eight hundred ninety thousand, six hundred thirty-nine".