27978093 has 24 divisors (see below), whose sum is σ = 47480160. Its totient is φ = 15651360.

The previous prime is 27978091. The next prime is 27978109. The reversal of 27978093 is 39087972.

It is not a de Polignac number, because 27978093 - 2¹ = 27978091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27978091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9583 + ... + 12156.

It is an arithmetic number, because the mean of its divisors is an integer number (1978340).

Almost surely, 2^27978093 is an apocalyptic number.

It is an amenable number.

27978093 is a deficient number, since it is larger than the sum of its proper divisors (19502067).

27978093 is a wasteful number, since it uses less digits than its factorization.

27978093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21769 (or 21766 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 27978093 is about 5289.4322001515. The cubic root of 27978093 is about 303.5796830077.

The spelling of 27978093 in words is "twenty-seven million, nine hundred seventy-eight thousand, ninety-three".