27768788 has 6 divisors (see below), whose sum is σ = 48595386. Its totient is φ = 13884392.

The previous prime is 27768787. The next prime is 27768791. The reversal of 27768788 is 88786772.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25421764 + 2347024 = 5042^2 + 1532^2 .

It is a super-2 number, since 2×27768788² = 1542211173977888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27768781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3471095 + ... + 3471102.

It is an arithmetic number, because the mean of its divisors is an integer number (8099231).

Almost surely, 2^27768788 is an apocalyptic number.

It is an amenable number.

27768788 is a deficient number, since it is larger than the sum of its proper divisors (20826598).

27768788 is a wasteful number, since it uses less digits than its factorization.

27768788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6942201 (or 6942199 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 53.

The square root of 27768788 is about 5269.6098527310. The cubic root of 27768788 is about 302.8207575929.

The spelling of 27768788 in words is "twenty-seven million, seven hundred sixty-eight thousand, seven hundred eighty-eight".