23207728 has 20 divisors (see below), whose sum is σ = 45638200. Its totient is φ = 11430144.

The previous prime is 23207719. The next prime is 23207741. The reversal of 23207728 is 82770232.

It is a self number, because there is not a number n which added to its sum of digits gives 23207728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9753 + ... + 11896.

It is an arithmetic number, because the mean of its divisors is an integer number (2281910).

Almost surely, 2^23207728 is an apocalyptic number.

It is an amenable number.

23207728 is a deficient number, since it is larger than the sum of its proper divisors (22430472).

23207728 is a wasteful number, since it uses less digits than its factorization.

23207728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21724 (or 21718 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 23207728 is about 4817.4399840579. The cubic root of 23207728 is about 285.2402939055.

The spelling of 23207728 in words is "twenty-three million, two hundred seven thousand, seven hundred twenty-eight".