27940705 has 16 divisors (see below), whose sum is σ = 36550080. Its totient is φ = 20380608.

The previous prime is 27940691. The next prime is 27940723. The reversal of 27940705 is 50704972.

It is a cyclic number.

It is not a de Polignac number, because 27940705 - 2¹⁷ = 27809633 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2806 + ... + 7984.

It is an arithmetic number, because the mean of its divisors is an integer number (2284380).

Almost surely, 2^27940705 is an apocalyptic number.

It is an amenable number.

27940705 is a deficient number, since it is larger than the sum of its proper divisors (8609375).

27940705 is a wasteful number, since it uses less digits than its factorization.

27940705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 27940705 is about 5285.8968018682. The cubic root of 27940705 is about 303.4443950542. Note that the first 3 decimals are identical.

The spelling of 27940705 in words is "twenty-seven million, nine hundred forty thousand, seven hundred five".