28333986 has 16 divisors (see below), whose sum is σ = 58622400. Its totient is φ = 9118928.

The previous prime is 28333967. The next prime is 28334003. The reversal of 28333986 is 68933382.

It is a Curzon 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, 81246 + ... + 81593.

It is an arithmetic number, because the mean of its divisors is an integer number (3663900).

Almost surely, 2^28333986 is an apocalyptic number.

28333986 is an abundant number, since it is smaller than the sum of its proper divisors (30288414).

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

28333986 is a wasteful number, since it uses less digits than its factorization.

28333986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162873.

The product of its digits is 186624, while the sum is 42.

The square root of 28333986 is about 5322.9677812288. The cubic root of 28333986 is about 304.8614832811.

The spelling of 28333986 in words is "twenty-eight million, three hundred thirty-three thousand, nine hundred eighty-six".