28815018 has 16 divisors (see below), whose sum is σ = 57684000. Its totient is φ = 9596016.

The previous prime is 28814969. The next prime is 28815029. The reversal of 28815018 is 81051882.

It is a self number, because there is not a number n which added to its sum of digits gives 28815018.

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, 9108 + ... + 11856.

It is an arithmetic number, because the mean of its divisors is an integer number (3605250).

Almost surely, 2^28815018 is an apocalyptic number.

28815018 is an abundant number, since it is smaller than the sum of its proper divisors (28868982).

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

28815018 is a wasteful number, since it uses less digits than its factorization.

28815018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 28815018 is about 5367.9621831753. The cubic root of 28815018 is about 306.5770434910.

The spelling of 28815018 in words is "twenty-eight million, eight hundred fifteen thousand, eighteen".