27720341 has 4 divisors (see below), whose sum is σ = 30240384. Its totient is φ = 25200300.

The previous prime is 27720323. The next prime is 27720347. The reversal of 27720341 is 14302772.

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 a de Polignac number, because none of the positive numbers 2^k-27720341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27720341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27720347) 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, 1260005 + ... + 1260026.

It is an arithmetic number, because the mean of its divisors is an integer number (7560096).

Almost surely, 2^27720341 is an apocalyptic number.

It is an amenable number.

27720341 is a deficient number, since it is larger than the sum of its proper divisors (2520043).

27720341 is a wasteful number, since it uses less digits than its factorization.

27720341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520042.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 27720341 is about 5265.0110161328. The cubic root of 27720341 is about 302.6445489982.

Subtracting from 27720341 its reverse (14302772), we obtain a square (13417569 = 3663²).

The spelling of 27720341 in words is "twenty-seven million, seven hundred twenty thousand, three hundred forty-one".