27768738 has 16 divisors (see below), whose sum is σ = 56088576. Its totient is φ = 9164400.

The previous prime is 27768721. The next prime is 27768781. The reversal of 27768738 is 83786772.

It is a super-2 number, since 2×27768738² = 1542205620225288, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22306 + ... + 23517.

It is an arithmetic number, because the mean of its divisors is an integer number (3505536).

Almost surely, 2^27768738 is an apocalyptic number.

27768738 is an abundant number, since it is smaller than the sum of its proper divisors (28319838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27768738 is a wasteful number, since it uses less digits than its factorization.

27768738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45929.

The product of its digits is 790272, while the sum is 48.

The square root of 27768738 is about 5269.6051085447. The cubic root of 27768738 is about 302.8205758416.

The spelling of 27768738 in words is "twenty-seven million, seven hundred sixty-eight thousand, seven hundred thirty-eight".