27855947 has 8 divisors (see below), whose sum is σ = 31881696. Its totient is φ = 23841792.

The previous prime is 27855929. The next prime is 27855983. The reversal of 27855947 is 74955872.

It is a happy number.

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 27855947 - 2¹² = 27851851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27851947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3083 + ... + 8075.

It is an arithmetic number, because the mean of its divisors is an integer number (3985212).

Almost surely, 2^27855947 is an apocalyptic number.

27855947 is a deficient number, since it is larger than the sum of its proper divisors (4025749).

27855947 is an equidigital number, since it uses as much as digits as its factorization.

27855947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5797.

The product of its digits is 705600, while the sum is 47.

The square root of 27855947 is about 5277.8733406553. The cubic root of 27855947 is about 303.1372518802.

The spelling of 27855947 in words is "twenty-seven million, eight hundred fifty-five thousand, nine hundred forty-seven".