28136994 has 16 divisors (see below), whose sum is σ = 56907360. Its totient is φ = 9273440.

The previous prime is 28136971. The next prime is 28137013. The reversal of 28136994 is 49963182.

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, 25812 + ... + 26879.

It is an arithmetic number, because the mean of its divisors is an integer number (3556710).

Almost surely, 2^28136994 is an apocalyptic number.

28136994 is an abundant number, since it is smaller than the sum of its proper divisors (28770366).

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

28136994 is a wasteful number, since it uses less digits than its factorization.

28136994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52785.

The product of its digits is 93312, while the sum is 42.

The square root of 28136994 is about 5304.4315435304. The cubic root of 28136994 is about 304.1533232236.

The spelling of 28136994 in words is "twenty-eight million, one hundred thirty-six thousand, nine hundred ninety-four".