27788965 has 16 divisors (see below), whose sum is σ = 36134208. Its totient is φ = 20434176.

The previous prime is 27788953. The next prime is 27789011. The reversal of 27788965 is 56988772.

It is a cyclic number.

It is not a de Polignac number, because 27788965 - 2¹³ = 27780773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147 + ... + 7456.

It is an arithmetic number, because the mean of its divisors is an integer number (2258388).

Almost surely, 2^27788965 is an apocalyptic number.

It is an amenable number.

27788965 is a deficient number, since it is larger than the sum of its proper divisors (8345243).

27788965 is a wasteful number, since it uses less digits than its factorization.

27788965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7668.

The product of its digits is 1693440, while the sum is 52.

The square root of 27788965 is about 5271.5239731979. The cubic root of 27788965 is about 302.8940837456.

The spelling of 27788965 in words is "twenty-seven million, seven hundred eighty-eight thousand, nine hundred sixty-five".