28278604 has 12 divisors (see below), whose sum is σ = 49998424. Its totient is φ = 13993344.

The previous prime is 28278587. The next prime is 28278617. The reversal of 28278604 is 40687282.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36054 + ... + 36829.

Almost surely, 2^28278604 is an apocalyptic number.

It is an amenable number.

28278604 is a deficient number, since it is larger than the sum of its proper divisors (21719820).

28278604 is a wasteful number, since it uses less digits than its factorization.

28278604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72984 (or 72982 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 28278604 is about 5317.7630635447. The cubic root of 28278604 is about 304.6627249055.

It can be divided in two parts, 28278 and 604, that added together give a palindrome (28882).

The spelling of 28278604 in words is "twenty-eight million, two hundred seventy-eight thousand, six hundred four".