28686894 has 16 divisors (see below), whose sum is σ = 57509760. Its totient is φ = 9539640.

The previous prime is 28686893. The next prime is 28686899. The reversal of 28686894 is 49868682.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28686893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2812 + ... + 8079.

It is an arithmetic number, because the mean of its divisors is an integer number (3594360).

Almost surely, 2^28686894 is an apocalyptic number.

28686894 is an abundant number, since it is smaller than the sum of its proper divisors (28822866).

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

28686894 is a wasteful number, since it uses less digits than its factorization.

28686894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11335.

The product of its digits is 1327104, while the sum is 51.

The square root of 28686894 is about 5356.0147497930. The cubic root of 28686894 is about 306.1219770879.

The spelling of 28686894 in words is "twenty-eight million, six hundred eighty-six thousand, eight hundred ninety-four".