27664631 has 8 divisors (see below), whose sum is σ = 27971328. Its totient is φ = 27360000.

The previous prime is 27664621. The next prime is 27664639. The reversal of 27664631 is 13646672.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27664631 is a prime.

It is a super-2 number, since 2×27664631² = 1530663616732322, 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 = 27664591 and 27664600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27664639) 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, 45731 + ... + 46331.

It is an arithmetic number, because the mean of its divisors is an integer number (3496416).

Almost surely, 2^27664631 is an apocalyptic number.

27664631 is a deficient number, since it is larger than the sum of its proper divisors (306697).

27664631 is a wasteful number, since it uses less digits than its factorization.

27664631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033.

The product of its digits is 36288, while the sum is 35.

The square root of 27664631 is about 5259.7177680936. The cubic root of 27664631 is about 302.4416698769.

The spelling of 27664631 in words is "twenty-seven million, six hundred sixty-four thousand, six hundred thirty-one".