27864977 has 8 divisors (see below), whose sum is σ = 32496000. Its totient is φ = 23883972.

The previous prime is 27864973. The next prime is 27864979. The reversal of 27864977 is 77946872.

It is not a de Polignac number, because 27864977 - 2² = 27864973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27864971) 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, 40277 + ... + 40962.

It is an arithmetic number, because the mean of its divisors is an integer number (4062000).

Almost surely, 2^27864977 is an apocalyptic number.

It is an amenable number.

27864977 is a deficient number, since it is larger than the sum of its proper divisors (4631023).

27864977 is an frugal number, since it uses more digits than its factorization.

27864977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81260 (or 81246 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 50.

The square root of 27864977 is about 5278.7287295333. The cubic root of 27864977 is about 303.1700041162.

The spelling of 27864977 in words is "twenty-seven million, eight hundred sixty-four thousand, nine hundred seventy-seven".