27720164 has 12 divisors (see below), whose sum is σ = 51063600. Its totient is φ = 13130568.

The previous prime is 27720151. The next prime is 27720167. The reversal of 27720164 is 46102772.

It is not an unprimeable number, because it can be changed into a prime (27720167) 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, 182294 + ... + 182445.

It is an arithmetic number, because the mean of its divisors is an integer number (4255300).

Almost surely, 2^27720164 is an apocalyptic number.

It is an amenable number.

27720164 is a deficient number, since it is larger than the sum of its proper divisors (23343436).

27720164 is a wasteful number, since it uses less digits than its factorization.

27720164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364762 (or 364760 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 27720164 is about 5264.9942070244. The cubic root of 27720164 is about 302.6439048479.

The spelling of 27720164 in words is "twenty-seven million, seven hundred twenty thousand, one hundred sixty-four".