27979983 has 48 divisors (see below), whose sum is σ = 44928000. Its totient is φ = 16720704.

The previous prime is 27979981. The next prime is 27980021. The reversal of 27979983 is 38997972.

It is not a de Polignac number, because 27979983 - 2¹ = 27979981 is a prime.

Its product of digits (1714608) is a multiple of the sum of its prime factors (196).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27979981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 354138 + ... + 354216.

It is an arithmetic number, because the mean of its divisors is an integer number (936000).

Almost surely, 2^27979983 is an apocalyptic number.

27979983 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

27979983 is a deficient number, since it is larger than the sum of its proper divisors (16948017).

27979983 is a wasteful number, since it uses less digits than its factorization.

27979983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 193 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 27979983 is about 5289.6108552520. The cubic root of 27979983 is about 303.5865187450.

The spelling of 27979983 in words is "twenty-seven million, nine hundred seventy-nine thousand, nine hundred eighty-three".