27640851 has 24 divisors (see below), whose sum is σ = 43611840. Its totient is φ = 15522192.

The previous prime is 27640831. The next prime is 27640853. The reversal of 27640851 is 15804672.

It is not a de Polignac number, because 27640851 - 2⁹ = 27640339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27640853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7080 + ... + 10266.

It is an arithmetic number, because the mean of its divisors is an integer number (1817160).

Almost surely, 2^27640851 is an apocalyptic number.

27640851 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

27640851 is a deficient number, since it is larger than the sum of its proper divisors (15970989).

27640851 is a wasteful number, since it uses less digits than its factorization.

27640851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3263 (or 3256 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 27640851 is about 5257.4567045293. The cubic root of 27640851 is about 302.3549872988.

The spelling of 27640851 in words is "twenty-seven million, six hundred forty thousand, eight hundred fifty-one".