27790937 has 4 divisors (see below), whose sum is σ = 29425716. Its totient is φ = 26156160.

The previous prime is 27790927. The next prime is 27790949. The reversal of 27790937 is 73909772.

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 9634816 + 18156121 = 3104^2 + 4261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27790937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27790927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 817364 + ... + 817397.

It is an arithmetic number, because the mean of its divisors is an integer number (7356429).

Almost surely, 2^27790937 is an apocalyptic number.

It is an amenable number.

27790937 is a deficient number, since it is larger than the sum of its proper divisors (1634779).

27790937 is a wasteful number, since it uses less digits than its factorization.

27790937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634778.

The product of its (nonzero) digits is 166698, while the sum is 44.

The square root of 27790937 is about 5271.7110125651. The cubic root of 27790937 is about 302.9012483762.

The spelling of 27790937 in words is "twenty-seven million, seven hundred ninety thousand, nine hundred thirty-seven".