27968431 has 4 divisors (see below), whose sum is σ = 28563552. Its totient is φ = 27373312.

The previous prime is 27968429. The next prime is 27968453. The reversal of 27968431 is 13486972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27968431 - 2¹ = 27968429 is a prime.

It is a super-2 number, since 2×27968431² = 1564466265203522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27968401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297490 + ... + 297583.

It is an arithmetic number, because the mean of its divisors is an integer number (7140888).

Almost surely, 2^27968431 is an apocalyptic number.

27968431 is a deficient number, since it is larger than the sum of its proper divisors (595121).

27968431 is an equidigital number, since it uses as much as digits as its factorization.

27968431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595120.

The product of its digits is 72576, while the sum is 40.

The square root of 27968431 is about 5288.5187907390. The cubic root of 27968431 is about 303.5447327508.

The spelling of 27968431 in words is "twenty-seven million, nine hundred sixty-eight thousand, four hundred thirty-one".