27991282 has 16 divisors (see below), whose sum is σ = 48498912. Its totient is φ = 11974720.

The previous prime is 27991267. The next prime is 27991291. The reversal of 27991282 is 28219972.

It is a super-3 number, since 3×27991282³ (a number of 23 digits) contains 333 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, 37048 + ... + 37795.

It is an arithmetic number, because the mean of its divisors is an integer number (3031182).

Almost surely, 2^27991282 is an apocalyptic number.

27991282 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

27991282 is a deficient number, since it is larger than the sum of its proper divisors (20507630).

27991282 is a wasteful number, since it uses less digits than its factorization.

27991282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74873.

The product of its digits is 36288, while the sum is 40.

The square root of 27991282 is about 5290.6787844283. The cubic root of 27991282 is about 303.6273784606.

The spelling of 27991282 in words is "twenty-seven million, nine hundred ninety-one thousand, two hundred eighty-two".