23081728 has 18 divisors (see below), whose sum is σ = 46073804. Its totient is φ = 11540736.

The previous prime is 23081717. The next prime is 23081741. The reversal of 23081728 is 82718032.

It is a self number, because there is not a number n which added to its sum of digits gives 23081728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44826 + ... + 45337.

Almost surely, 2^23081728 is an apocalyptic number.

It is an amenable number.

23081728 is a deficient number, since it is larger than the sum of its proper divisors (22992076).

23081728 is an frugal number, since it uses more digits than its factorization.

23081728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90179 (or 90165 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 23081728 is about 4804.3447003728. The cubic root of 23081728 is about 284.7231455293.

The spelling of 23081728 in words is "twenty-three million, eighty-one thousand, seven hundred twenty-eight".