23109228 has 18 divisors (see below), whose sum is σ = 58415084. Its totient is φ = 7703064.

The previous prime is 23109223. The next prime is 23109253. The reversal of 23109228 is 82290132.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (23109223) 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, 320926 + ... + 320997.

Almost surely, 2^23109228 is an apocalyptic number.

It is an amenable number.

23109228 is an abundant number, since it is smaller than the sum of its proper divisors (35305856).

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

23109228 is a wasteful number, since it uses less digits than its factorization.

23109228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641933 (or 641928 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 23109228 is about 4807.2058412346. The cubic root of 23109228 is about 284.8361754694.

The spelling of 23109228 in words is "twenty-three million, one hundred nine thousand, two hundred twenty-eight".