28308678 has 16 divisors (see below), whose sum is σ = 57686256. Its totient is φ = 9258080.

The previous prime is 28308667. The next prime is 28308713. The reversal of 28308678 is 87680382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44193 + ... + 44828.

It is an arithmetic number, because the mean of its divisors is an integer number (3605391).

Almost surely, 2^28308678 is an apocalyptic number.

28308678 is an abundant number, since it is smaller than the sum of its proper divisors (29377578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28308678 is a wasteful number, since it uses less digits than its factorization.

28308678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89079.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 28308678 is about 5320.5900048773. The cubic root of 28308678 is about 304.7706885171.

The spelling of 28308678 in words is "twenty-eight million, three hundred eight thousand, six hundred seventy-eight".