28528818 has 16 divisors (see below), whose sum is σ = 57153600. Its totient is φ = 9493616.

The previous prime is 28528807. The next prime is 28528831. The reversal of 28528818 is 81882582.

It is a self number, because there is not a number n which added to its sum of digits gives 28528818.

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, 208 + ... + 7556.

It is an arithmetic number, because the mean of its divisors is an integer number (3572100).

Almost surely, 2^28528818 is an apocalyptic number.

28528818 is an abundant number, since it is smaller than the sum of its proper divisors (28624782).

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

28528818 is a wasteful number, since it uses less digits than its factorization.

28528818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8001.

The product of its digits is 81920, while the sum is 42.

The square root of 28528818 is about 5341.2374970600. The cubic root of 28528818 is about 305.5586571929.

The spelling of 28528818 in words is "twenty-eight million, five hundred twenty-eight thousand, eight hundred eighteen".