27731982 has 16 divisors (see below), whose sum is σ = 58383360. Its totient is φ = 8757432.

The previous prime is 27731969. The next prime is 27732007. The reversal of 27731982 is 28913772.

It is a self number, because there is not a number n which added to its sum of digits gives 27731982.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121518 + ... + 121745.

It is an arithmetic number, because the mean of its divisors is an integer number (3648960).

Almost surely, 2^27731982 is an apocalyptic number.

27731982 is an abundant number, since it is smaller than the sum of its proper divisors (30651378).

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

27731982 is a wasteful number, since it uses less digits than its factorization.

27731982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243287.

The product of its digits is 42336, while the sum is 39.

The square root of 27731982 is about 5266.1164058536. The cubic root of 27731982 is about 302.6869076900.

The spelling of 27731982 in words is "twenty-seven million, seven hundred thirty-one thousand, nine hundred eighty-two".