27878164 has 48 divisors (see below), whose sum is σ = 54492480. Its totient is φ = 12418560.

The previous prime is 27878161. The next prime is 27878171. The reversal of 27878164 is 46187872.

It is a self number, because there is not a number n which added to its sum of digits gives 27878164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27878161) 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, 132019 + ... + 132229.

It is an arithmetic number, because the mean of its divisors is an integer number (1135260).

Almost surely, 2^27878164 is an apocalyptic number.

It is an amenable number.

27878164 is a deficient number, since it is larger than the sum of its proper divisors (26614316).

27878164 is a wasteful number, since it uses less digits than its factorization.

27878164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 326 counting only the distinct ones).

The product of its digits is 150528, while the sum is 43.

The square root of 27878164 is about 5279.9776514679. The cubic root of 27878164 is about 303.2178212781.

The spelling of 27878164 in words is "twenty-seven million, eight hundred seventy-eight thousand, one hundred sixty-four".