27780041 has 4 divisors (see below), whose sum is σ = 27859092. Its totient is φ = 27700992.

The previous prime is 27780037. The next prime is 27780043. The reversal of 27780041 is 14008772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5017600 + 22762441 = 2240^2 + 4771^2 .

It is a cyclic number.

It is not a de Polignac number, because 27780041 - 2² = 27780037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27779986 and 27780013.

It is not an unprimeable number, because it can be changed into a prime (27780043) 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, 38996 + ... + 39701.

It is an arithmetic number, because the mean of its divisors is an integer number (6964773).

Almost surely, 2^27780041 is an apocalyptic number.

It is an amenable number.

27780041 is a deficient number, since it is larger than the sum of its proper divisors (79051).

27780041 is an equidigital number, since it uses as much as digits as its factorization.

27780041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79050.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 27780041 is about 5270.6774706863. The cubic root of 27780041 is about 302.8616570107.

The spelling of 27780041 in words is "twenty-seven million, seven hundred eighty thousand, forty-one".