28890286 has 16 divisors (see below), whose sum is σ = 44142336. Its totient is φ = 14178816.

The previous prime is 28890263. The next prime is 28890307. The reversal of 28890286 is 68209882.

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, 26035 + ... + 27121.

It is an arithmetic number, because the mean of its divisors is an integer number (2758896).

Almost surely, 2^28890286 is an apocalyptic number.

28890286 is a deficient number, since it is larger than the sum of its proper divisors (15252050).

28890286 is a wasteful number, since it uses less digits than its factorization.

28890286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 28890286 is about 5374.9684650238. The cubic root of 28890286 is about 306.8437490696.

The spelling of 28890286 in words is "twenty-eight million, eight hundred ninety thousand, two hundred eighty-six".