27831993 has 8 divisors (see below), whose sum is σ = 42410688. Its totient is φ = 15903984.

The previous prime is 27831983. The next prime is 27831997. The reversal of 27831993 is 39913872.

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

It is not a de Polignac number, because 27831993 - 2⁹ = 27831481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27831997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662646 + ... + 662687.

It is an arithmetic number, because the mean of its divisors is an integer number (5301336).

Almost surely, 2^27831993 is an apocalyptic number.

It is an amenable number.

27831993 is a deficient number, since it is larger than the sum of its proper divisors (14578695).

27831993 is a wasteful number, since it uses less digits than its factorization.

27831993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325343.

The product of its digits is 81648, while the sum is 42.

The square root of 27831993 is about 5275.6035673655. The cubic root of 27831993 is about 303.0503352859.

The spelling of 27831993 in words is "twenty-seven million, eight hundred thirty-one thousand, nine hundred ninety-three".