27996431 has 8 divisors (see below), whose sum is σ = 28400400. Its totient is φ = 27595008.

The previous prime is 27996427. The next prime is 27996439. The reversal of 27996431 is 13469972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27996431 - 2² = 27996427 is a prime.

It is a super-2 number, since 2×27996431² = 1567600297475522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27996439) 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, 33440 + ... + 34266.

It is an arithmetic number, because the mean of its divisors is an integer number (3550050).

Almost surely, 2^27996431 is an apocalyptic number.

27996431 is a deficient number, since it is larger than the sum of its proper divisors (403969).

27996431 is an equidigital number, since it uses as much as digits as its factorization.

27996431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273.

The product of its digits is 81648, while the sum is 41.

The square root of 27996431 is about 5291.1653725810. The cubic root of 27996431 is about 303.6459947512.

The spelling of 27996431 in words is "twenty-seven million, nine hundred ninety-six thousand, four hundred thirty-one".