27904949 has 4 divisors (see below), whose sum is σ = 27918540. Its totient is φ = 27891360.

The previous prime is 27904937. The next prime is 27904963. The reversal of 27904949 is 94940972.

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 792100 + 27112849 = 890^2 + 5207^2 .

It is a cyclic number.

It is not a de Polignac number, because 27904949 - 2⁸ = 27904693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27903949) 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, 3014 + ... + 8055.

It is an arithmetic number, because the mean of its divisors is an integer number (6979635).

Almost surely, 2^27904949 is an apocalyptic number.

It is an amenable number.

27904949 is a deficient number, since it is larger than the sum of its proper divisors (13591).

27904949 is a wasteful number, since it uses less digits than its factorization.

27904949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13590.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 27904949 is about 5282.5135115776. The cubic root of 27904949 is about 303.3148995225.

The spelling of 27904949 in words is "twenty-seven million, nine hundred four thousand, nine hundred forty-nine".