27972868 has 24 divisors (see below), whose sum is σ = 61032384. Its totient is φ = 10898400.

The previous prime is 27972863. The next prime is 27972869. The reversal of 27972868 is 86827972.

It is not an unprimeable number, because it can be changed into a prime (27972863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45103 + ... + 45718.

It is an arithmetic number, because the mean of its divisors is an integer number (2543016).

Almost surely, 2^27972868 is an apocalyptic number.

27972868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27972868 is an abundant number, since it is smaller than the sum of its proper divisors (33059516).

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

27972868 is a wasteful number, since it uses less digits than its factorization.

27972868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90843 (or 90841 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 27972868 is about 5288.9382677433. The cubic root of 27972868 is about 303.5607836663.

It can be divided in two parts, 2797 and 2868, that added together give a palindrome (5665).

The spelling of 27972868 in words is "twenty-seven million, nine hundred seventy-two thousand, eight hundred sixty-eight".