27760961 has 4 divisors (see below), whose sum is σ = 28035924. Its totient is φ = 27486000.

The previous prime is 27760939. The next prime is 27760963. The reversal of 27760961 is 16906772.

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 17901361 + 9859600 = 4231^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 27760961 - 2²² = 23566657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27760963) 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, 137330 + ... + 137531.

It is an arithmetic number, because the mean of its divisors is an integer number (7008981).

Almost surely, 2^27760961 is an apocalyptic number.

It is an amenable number.

27760961 is a deficient number, since it is larger than the sum of its proper divisors (274963).

27760961 is a wasteful number, since it uses less digits than its factorization.

27760961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274962.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 27760961 is about 5268.8671457914. The cubic root of 27760961 is about 302.7923035748.

The spelling of 27760961 in words is "twenty-seven million, seven hundred sixty thousand, nine hundred sixty-one".