28888566 has 16 divisors (see below), whose sum is σ = 66031104. Its totient is φ = 8253864.

The previous prime is 28888549. The next prime is 28888571. The reversal of 28888566 is 66588882.

It is a Curzon number.

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, 343870 + ... + 343953.

It is an arithmetic number, because the mean of its divisors is an integer number (4126944).

Almost surely, 2^28888566 is an apocalyptic number.

28888566 is an abundant number, since it is smaller than the sum of its proper divisors (37142538).

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

28888566 is a wasteful number, since it uses less digits than its factorization.

28888566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687835.

The product of its digits is 1474560, while the sum is 51.

The square root of 28888566 is about 5374.8084617035. The cubic root of 28888566 is about 306.8376595750.

The spelling of 28888566 in words is "twenty-eight million, eight hundred eighty-eight thousand, five hundred sixty-six".