27911972 has 24 divisors (see below), whose sum is σ = 55605312. Its totient is φ = 12135200.

The previous prime is 27911971. The next prime is 27911981.

27911972 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (27911971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12779 + ... + 14802.

It is an arithmetic number, because the mean of its divisors is an integer number (2316888).

Almost surely, 2^27911972 is an apocalyptic number.

27911972 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

27911972 is a deficient number, since it is larger than the sum of its proper divisors (27693340).

27911972 is a wasteful number, since it uses less digits than its factorization.

27911972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27619 (or 27617 counting only the distinct ones).

The product of its digits is 15876, while the sum is 38.

The square root of 27911972 is about 5283.1782101307. The cubic root of 27911972 is about 303.3403430601.

The spelling of 27911972 in words is "twenty-seven million, nine hundred eleven thousand, nine hundred seventy-two".