23217828 has 24 divisors (see below), whose sum is σ = 54266688. Its totient is φ = 7726176.

The previous prime is 23217797. The next prime is 23217841. The reversal of 23217828 is 82871232.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8025 + ... + 10527.

It is an arithmetic number, because the mean of its divisors is an integer number (2261112).

Almost surely, 2^23217828 is an apocalyptic number.

It is an amenable number.

23217828 is an abundant number, since it is smaller than the sum of its proper divisors (31048860).

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

23217828 is a wasteful number, since it uses less digits than its factorization.

23217828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283 (or 3281 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 23217828 is about 4818.4881446362. The cubic root of 23217828 is about 285.2816667497.

The spelling of 23217828 in words is "twenty-three million, two hundred seventeen thousand, eight hundred twenty-eight".