28273994 has 16 divisors (see below), whose sum is σ = 49780608. Its totient is φ = 11789712.

The previous prime is 28273967. The next prime is 28273997. The reversal of 28273994 is 49937282.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28273997) 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, 26774 + ... + 27809.

It is an arithmetic number, because the mean of its divisors is an integer number (3111288).

Almost surely, 2^28273994 is an apocalyptic number.

28273994 is a deficient number, since it is larger than the sum of its proper divisors (21506614).

28273994 is a wasteful number, since it uses less digits than its factorization.

28273994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54629.

The product of its digits is 217728, while the sum is 44.

The square root of 28273994 is about 5317.3295929442. The cubic root of 28273994 is about 304.6461685544.

The spelling of 28273994 in words is "twenty-eight million, two hundred seventy-three thousand, nine hundred ninety-four".