28160986 has 16 divisors (see below), whose sum is σ = 49262400. Its totient is φ = 12068700.

The previous prime is 28160981. The next prime is 28160999. The reversal of 28160986 is 68906182.

It is a super-2 number, since 2×28160986² = 1586082264984392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28160981) 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, 19840 + ... + 21211.

It is an arithmetic number, because the mean of its divisors is an integer number (3078900).

Almost surely, 2^28160986 is an apocalyptic number.

28160986 is a deficient number, since it is larger than the sum of its proper divisors (21101414).

28160986 is an equidigital number, since it uses as much as digits as its factorization.

28160986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41074 (or 41060 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 28160986 is about 5306.6925669385. The cubic root of 28160986 is about 304.2397476823.

The spelling of 28160986 in words is "twenty-eight million, one hundred sixty thousand, nine hundred eighty-six".