27939847 has 16 divisors (see below), whose sum is σ = 31983840. Its totient is φ = 24216192.

The previous prime is 27939797. The next prime is 27939869. The reversal of 27939847 is 74893972.

It is not a de Polignac number, because 27939847 - 2¹⁵ = 27907079 is a prime.

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 27939847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27939887) 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 15 ways as a sum of consecutive naturals, for example, 12948 + ... + 14950.

It is an arithmetic number, because the mean of its divisors is an integer number (1998990).

Almost surely, 2^27939847 is an apocalyptic number.

27939847 is a deficient number, since it is larger than the sum of its proper divisors (4043993).

27939847 is a wasteful number, since it uses less digits than its factorization.

27939847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082.

The product of its digits is 762048, while the sum is 49.

The square root of 27939847 is about 5285.8156418854. The cubic root of 27939847 is about 303.4412889770.

The spelling of 27939847 in words is "twenty-seven million, nine hundred thirty-nine thousand, eight hundred forty-seven".