27608431 has 4 divisors (see below), whose sum is σ = 27893152. Its totient is φ = 27323712.

The previous prime is 27608419. The next prime is 27608437. The reversal of 27608431 is 13480672.

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 27608431 - 2¹⁵ = 27575663 is a prime.

It is a super-2 number, since 2×27608431² = 1524450924563522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27608393 and 27608402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27608437) 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, 142215 + ... + 142408.

It is an arithmetic number, because the mean of its divisors is an integer number (6973288).

Almost surely, 2^27608431 is an apocalyptic number.

27608431 is a deficient number, since it is larger than the sum of its proper divisors (284721).

27608431 is an equidigital number, since it uses as much as digits as its factorization.

27608431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284720.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 27608431 is about 5254.3725600684. The cubic root of 27608431 is about 302.2367301633.

The spelling of 27608431 in words is "twenty-seven million, six hundred eight thousand, four hundred thirty-one".