23228891 has 6 divisors (see below), whose sum is σ = 27021420. Its totient is φ = 19910436.

The previous prime is 23228839. The next prime is 23228897. The reversal of 23228891 is 19882232.

It is not a de Polignac number, because 23228891 - 2¹⁴ = 23212507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23228897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236981 + ... + 237078.

It is an arithmetic number, because the mean of its divisors is an integer number (4503570).

Almost surely, 2^23228891 is an apocalyptic number.

23228891 is a deficient number, since it is larger than the sum of its proper divisors (3792529).

23228891 is an equidigital number, since it uses as much as digits as its factorization.

23228891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474073 (or 474066 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 23228891 is about 4819.6359821049. The cubic root of 23228891 is about 285.3269705846.

The spelling of 23228891 in words is "twenty-three million, two hundred twenty-eight thousand, eight hundred ninety-one".