27768773 has 4 divisors (see below), whose sum is σ = 27781728. Its totient is φ = 27755820.

The previous prime is 27768721. The next prime is 27768781. The reversal of 27768773 is 37786772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27768773 - 2¹² = 27764677 is a prime.

It is a super-2 number, since 2×27768773² = 1542209507851058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27768373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2411 + ... + 7832.

It is an arithmetic number, because the mean of its divisors is an integer number (6945432).

Almost surely, 2^27768773 is an apocalyptic number.

It is an amenable number.

27768773 is a deficient number, since it is larger than the sum of its proper divisors (12955).

27768773 is a wasteful number, since it uses less digits than its factorization.

27768773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12954.

The product of its digits is 691488, while the sum is 47.

The square root of 27768773 is about 5269.6084294756. The cubic root of 27768773 is about 302.8207030676.

The spelling of 27768773 in words is "twenty-seven million, seven hundred sixty-eight thousand, seven hundred seventy-three".