22431998 has 8 divisors (see below), whose sum is σ = 33727008. Its totient is φ = 11189664.

The previous prime is 22431973. The next prime is 22432001. The reversal of 22431998 is 89913422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12086 + ... + 13817.

It is an arithmetic number, because the mean of its divisors is an integer number (4215876).

Almost surely, 2^22431998 is an apocalyptic number.

22431998 is a deficient number, since it is larger than the sum of its proper divisors (11295010).

22431998 is a wasteful number, since it uses less digits than its factorization.

22431998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26338.

The product of its digits is 31104, while the sum is 38.

The square root of 22431998 is about 4736.2430258592. The cubic root of 22431998 is about 282.0261112921.

The spelling of 22431998 in words is "twenty-two million, four hundred thirty-one thousand, nine hundred ninety-eight".