22628431 has 8 divisors (see below), whose sum is σ = 25893504. Its totient is φ = 19371480.

The previous prime is 22628429. The next prime is 22628453. The reversal of 22628431 is 13482622.

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

It is a cyclic number.

It is not a de Polignac number, because 22628431 - 2¹ = 22628429 is a prime.

It is a super-2 number, since 2×22628431² = 1024091779043522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22628431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22628401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6156 + ... + 9118.

It is an arithmetic number, because the mean of its divisors is an integer number (3236688).

Almost surely, 2^22628431 is an apocalyptic number.

22628431 is a deficient number, since it is larger than the sum of its proper divisors (3265073).

22628431 is a wasteful number, since it uses less digits than its factorization.

22628431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4061.

The product of its digits is 4608, while the sum is 28.

The square root of 22628431 is about 4756.9350426509. The cubic root of 22628431 is about 282.8469374200.

The spelling of 22628431 in words is "twenty-two million, six hundred twenty-eight thousand, four hundred thirty-one".