27991682 has 16 divisors (see below), whose sum is σ = 42632352. Its totient is φ = 13782720.

The previous prime is 27991661. The next prime is 27991697. The reversal of 27991682 is 28619972.

It is a happy number.

It is a super-2 number, since 2×27991682² = 1567068522378248, which contains 22 as substring.

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, 47393 + ... + 47979.

It is an arithmetic number, because the mean of its divisors is an integer number (2664522).

Almost surely, 2^27991682 is an apocalyptic number.

27991682 is a deficient number, since it is larger than the sum of its proper divisors (14640670).

27991682 is a wasteful number, since it uses less digits than its factorization.

27991682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913.

The product of its digits is 108864, while the sum is 44.

The square root of 27991682 is about 5290.7165866260. The cubic root of 27991682 is about 303.6288247487.

The spelling of 27991682 in words is "twenty-seven million, nine hundred ninety-one thousand, six hundred eighty-two".