22890431 has 4 divisors (see below), whose sum is σ = 23628864. Its totient is φ = 22152000.

The previous prime is 22890409. The next prime is 22890467. The reversal of 22890431 is 13409822.

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

It is a cyclic number.

It is not a de Polignac number, because 22890431 - 2²² = 18696127 is a prime.

It is a super-2 number, since 2×22890431² = 1047943662731522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22890394 and 22890403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22890401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369170 + ... + 369231.

It is an arithmetic number, because the mean of its divisors is an integer number (5907216).

Almost surely, 2^22890431 is an apocalyptic number.

22890431 is a deficient number, since it is larger than the sum of its proper divisors (738433).

22890431 is an equidigital number, since it uses as much as digits as its factorization.

22890431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738432.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 22890431 is about 4784.3945280464. The cubic root of 22890431 is about 283.9343852583.

The spelling of 22890431 in words is "twenty-two million, eight hundred ninety thousand, four hundred thirty-one".