27997929 has 24 divisors (see below), whose sum is σ = 44209152. Its totient is φ = 16997760.

The previous prime is 27997903. The next prime is 27997943. The reversal of 27997929 is 92979972.

It is not a de Polignac number, because 27997929 - 2¹³ = 27989737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27997729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1792 + ... + 7694.

It is an arithmetic number, because the mean of its divisors is an integer number (1842048).

Almost surely, 2^27997929 is an apocalyptic number.

It is an amenable number.

27997929 is a deficient number, since it is larger than the sum of its proper divisors (16211223).

27997929 is a wasteful number, since it uses less digits than its factorization.

27997929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5957 (or 5954 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 27997929 is about 5291.3069274046. The cubic root of 27997929 is about 303.6514103652.

The spelling of 27997929 in words is "twenty-seven million, nine hundred ninety-seven thousand, nine hundred twenty-nine".