27979457 has 8 divisors (see below), whose sum is σ = 32129760. Its totient is φ = 24096960.

The previous prime is 27979447. The next prime is 27979459. The reversal of 27979457 is 75497972.

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 27979457 - 2²⁴ = 11202241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27979459) 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, 66728 + ... + 67145.

It is an arithmetic number, because the mean of its divisors is an integer number (4016220).

Almost surely, 2^27979457 is an apocalyptic number.

It is an amenable number.

27979457 is a deficient number, since it is larger than the sum of its proper divisors (4150303).

27979457 is a wasteful number, since it uses less digits than its factorization.

27979457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133903.

The product of its digits is 1111320, while the sum is 50.

The square root of 27979457 is about 5289.5611349147. The cubic root of 27979457 is about 303.5846163432.

The spelling of 27979457 in words is "twenty-seven million, nine hundred seventy-nine thousand, four hundred fifty-seven".