27781268 has 24 divisors (see below), whose sum is σ = 52372320. Its totient is φ = 12852000.

The previous prime is 27781267. The next prime is 27781279. The reversal of 27781268 is 86218772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27781267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 983 + ... + 7518.

It is an arithmetic number, because the mean of its divisors is an integer number (2182180).

Almost surely, 2^27781268 is an apocalyptic number.

It is an amenable number.

27781268 is a deficient number, since it is larger than the sum of its proper divisors (24591052).

27781268 is a wasteful number, since it uses less digits than its factorization.

27781268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8567 (or 8565 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 27781268 is about 5270.7938680999. The cubic root of 27781268 is about 302.8661159168.

The spelling of 27781268 in words is "twenty-seven million, seven hundred eighty-one thousand, two hundred sixty-eight".