27942991 has 8 divisors (see below), whose sum is σ = 28725840. Its totient is φ = 27166272.

The previous prime is 27942989. The next prime is 27943001. The reversal of 27942991 is 19924972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27942991 - 2¹ = 27942989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27942091) 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, 8625 + ... + 11413.

It is an arithmetic number, because the mean of its divisors is an integer number (3590730).

Almost surely, 2^27942991 is an apocalyptic number.

27942991 is a deficient number, since it is larger than the sum of its proper divisors (782849).

27942991 is a wasteful number, since it uses less digits than its factorization.

27942991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065.

The product of its digits is 81648, while the sum is 43.

The square root of 27942991 is about 5286.1130332220. The cubic root of 27942991 is about 303.4526703759.

The spelling of 27942991 in words is "twenty-seven million, nine hundred forty-two thousand, nine hundred ninety-one".