28608723 has 24 divisors (see below), whose sum is σ = 48550320. Its totient is φ = 16004160.

The previous prime is 28608721. The next prime is 28608731. The reversal of 28608723 is 32780682.

It is a happy number.

28608723 is a `hidden beast` number, since 28 + 608 + 7 + 23 = 666.

It is not a de Polignac number, because 28608723 - 2¹ = 28608721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28608721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9828 + ... + 12401.

It is an arithmetic number, because the mean of its divisors is an integer number (2022930).

Almost surely, 2^28608723 is an apocalyptic number.

28608723 is a deficient number, since it is larger than the sum of its proper divisors (19941597).

28608723 is a wasteful number, since it uses less digits than its factorization.

28608723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22259 (or 22256 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28608723 is about 5348.7122749312. The cubic root of 28608723 is about 305.8436661385.

The spelling of 28608723 in words is "twenty-eight million, six hundred eight thousand, seven hundred twenty-three".