27972858 has 16 divisors (see below), whose sum is σ = 56010240. Its totient is φ = 9313536.

The previous prime is 27972821. The next prime is 27972863. The reversal of 27972858 is 85827972.

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, 4378 + ... + 8666.

It is an arithmetic number, because the mean of its divisors is an integer number (3500640).

Almost surely, 2^27972858 is an apocalyptic number.

27972858 is an abundant number, since it is smaller than the sum of its proper divisors (28037382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27972858 is a wasteful number, since it uses less digits than its factorization.

27972858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381.

The product of its digits is 564480, while the sum is 48.

The square root of 27972858 is about 5288.9373223739. The cubic root of 27972858 is about 303.5607474930.

It can be divided in two parts, 279 and 72858, that added together give a palindrome (73137).

The spelling of 27972858 in words is "twenty-seven million, nine hundred seventy-two thousand, eight hundred fifty-eight".