28305286 has 16 divisors (see below), whose sum is σ = 43879968. Its totient is φ = 13686400.

The previous prime is 28305227. The next prime is 28305313. The reversal of 28305286 is 68250382.

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, 5646 + ... + 9406.

It is an arithmetic number, because the mean of its divisors is an integer number (2742498).

Almost surely, 2^28305286 is an apocalyptic number.

28305286 is a deficient number, since it is larger than the sum of its proper divisors (15574682).

28305286 is a wasteful number, since it uses less digits than its factorization.

28305286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3887.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28305286 is about 5320.2712336872. The cubic root of 28305286 is about 304.7585152951.

The spelling of 28305286 in words is "twenty-eight million, three hundred five thousand, two hundred eighty-six".