22431090 has 64 divisors (see below), whose sum is σ = 59398272. Its totient is φ = 5376000.

The previous prime is 22431089. The next prime is 22431107. The reversal of 22431090 is 9013422.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32994 + ... + 33666.

It is an arithmetic number, because the mean of its divisors is an integer number (928098).

Almost surely, 2^22431090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22431090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29699136).

22431090 is an abundant number, since it is smaller than the sum of its proper divisors (36967182).

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

22431090 is a wasteful number, since it uses less digits than its factorization.

22431090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 22431090 is about 4736.1471683215. The cubic root of 22431090 is about 282.0223059666.

It can be divided in two parts, 2243 and 1090, that added together give a palindrome (3333).

The spelling of 22431090 in words is "twenty-two million, four hundred thirty-one thousand, ninety".