27872979 has 16 divisors (see below), whose sum is σ = 39463200. Its totient is φ = 17438720.

The previous prime is 27872969. The next prime is 27873011. The reversal of 27872979 is 97927872.

It is a cyclic number.

It is not a de Polignac number, because 27872979 - 2⁵ = 27872947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (27872909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26047 + ... + 27095.

It is an arithmetic number, because the mean of its divisors is an integer number (2466450).

Almost surely, 2^27872979 is an apocalyptic number.

27872979 is a deficient number, since it is larger than the sum of its proper divisors (11590221).

27872979 is a wasteful number, since it uses less digits than its factorization.

27872979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590.

The product of its digits is 889056, while the sum is 51.

The square root of 27872979 is about 5279.4866227693. The cubic root of 27872979 is about 303.1990218349.

The spelling of 27872979 in words is "twenty-seven million, eight hundred seventy-two thousand, nine hundred seventy-nine".