27781941 has 16 divisors (see below), whose sum is σ = 40555008. Its totient is φ = 16777200.

The previous prime is 27781939. The next prime is 27781987. The reversal of 27781941 is 14918772.

It is not a de Polignac number, because 27781941 - 2¹ = 27781939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27781941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27781241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8910 + ... + 11616.

It is an arithmetic number, because the mean of its divisors is an integer number (2534688).

Almost surely, 2^27781941 is an apocalyptic number.

It is an amenable number.

27781941 is a deficient number, since it is larger than the sum of its proper divisors (12773067).

27781941 is a wasteful number, since it uses less digits than its factorization.

27781941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032.

The product of its digits is 28224, while the sum is 39.

The square root of 27781941 is about 5270.8577100886. The cubic root of 27781941 is about 302.8685615365.

The spelling of 27781941 in words is "twenty-seven million, seven hundred eighty-one thousand, nine hundred forty-one".