27690347 has 4 divisors (see below), whose sum is σ = 28583616. Its totient is φ = 26797080.

The previous prime is 27690337. The next prime is 27690349. The reversal of 27690347 is 74309672.

27690347 = 499² + 500² + ... + 591².

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 27690347 - 2⁶ = 27690283 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27690347.

It is not an unprimeable number, because it can be changed into a prime (27690349) 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, 446588 + ... + 446649.

It is an arithmetic number, because the mean of its divisors is an integer number (7145904).

Almost surely, 2^27690347 is an apocalyptic number.

27690347 is a deficient number, since it is larger than the sum of its proper divisors (893269).

27690347 is an equidigital number, since it uses as much as digits as its factorization.

27690347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893268.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 27690347 is about 5262.1618181124. The cubic root of 27690347 is about 302.5353536532.

The spelling of 27690347 in words is "twenty-seven million, six hundred ninety thousand, three hundred forty-seven".