27990467 has 4 divisors (see below), whose sum is σ = 28018200. Its totient is φ = 27962736.

The previous prime is 27990461. The next prime is 27990493. The reversal of 27990467 is 76409972.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27990467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27990461) 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 3 ways as a sum of consecutive naturals, for example, 12293 + ... + 14390.

It is an arithmetic number, because the mean of its divisors is an integer number (7004550).

Almost surely, 2^27990467 is an apocalyptic number.

27990467 is a deficient number, since it is larger than the sum of its proper divisors (27733).

27990467 is a wasteful number, since it uses less digits than its factorization.

27990467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27732.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 27990467 is about 5290.6017616146. The cubic root of 27990467 is about 303.6244316060.

The spelling of 27990467 in words is "twenty-seven million, nine hundred ninety thousand, four hundred sixty-seven".