27957969 has 24 divisors (see below), whose sum is σ = 44029440. Its totient is φ = 16991712.

The previous prime is 27957959. The next prime is 27957973. The reversal of 27957969 is 96975972.

27957969 is a `hidden beast` number, since 2 + 7 + 9 + 579 + 69 = 666.

It is not a de Polignac number, because 27957969 - 2⁷ = 27957841 is a prime.

It is a super-2 number, since 2×27957969² = 1563296061209922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27957929) 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 23 ways as a sum of consecutive naturals, for example, 8272 + ... + 11150.

It is an arithmetic number, because the mean of its divisors is an integer number (1834560).

Almost surely, 2^27957969 is an apocalyptic number.

It is an amenable number.

27957969 is a deficient number, since it is larger than the sum of its proper divisors (16071471).

27957969 is a wasteful number, since it uses less digits than its factorization.

27957969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981 (or 2978 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 27957969 is about 5287.5295743854. The cubic root of 27957969 is about 303.5068795841.

The spelling of 27957969 in words is "twenty-seven million, nine hundred fifty-seven thousand, nine hundred sixty-nine".