28158604 has 12 divisors (see below), whose sum is σ = 49319928. Its totient is φ = 14067200.

The previous prime is 28158587. The next prime is 28158617. The reversal of 28158604 is 40685182.

It is a self number, because there is not a number n which added to its sum of digits gives 28158604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4044 + ... + 8524.

It is an arithmetic number, because the mean of its divisors is an integer number (4109994).

Almost surely, 2^28158604 is an apocalyptic number.

It is an amenable number.

28158604 is a deficient number, since it is larger than the sum of its proper divisors (21161324).

28158604 is a wasteful number, since it uses less digits than its factorization.

28158604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6056 (or 6054 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 28158604 is about 5306.4681286144. The cubic root of 28158604 is about 304.2311693899.

It can be divided in two parts, 281 and 58604, that added together give a palindrome (58885).

The spelling of 28158604 in words is "twenty-eight million, one hundred fifty-eight thousand, six hundred four".