28275816 has 16 divisors (see below), whose sum is σ = 70689600. Its totient is φ = 9425264.

The previous prime is 28275803. The next prime is 28275817. The reversal of 28275816 is 61857282.

It is not an unprimeable number, because it can be changed into a prime (28275817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589056 + ... + 589103.

It is an arithmetic number, because the mean of its divisors is an integer number (4418100).

Almost surely, 2^28275816 is an apocalyptic number.

It is an amenable number.

28275816 is an abundant number, since it is smaller than the sum of its proper divisors (42413784).

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

28275816 is a wasteful number, since it uses less digits than its factorization.

28275816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178168 (or 1178164 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 28275816 is about 5317.5009167841. The cubic root of 28275816 is about 304.6527122991.

The spelling of 28275816 in words is "twenty-eight million, two hundred seventy-five thousand, eight hundred sixteen".