27389961 has 16 divisors (see below), whose sum is σ = 40660800. Its totient is φ = 18222624.

The previous prime is 27389939. The next prime is 27389969. The reversal of 27389961 is 16998372.

It is not a de Polignac number, because 27389961 - 2¹³ = 27381769 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (27389969) 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, 20605 + ... + 21893.

It is an arithmetic number, because the mean of its divisors is an integer number (2541300).

Almost surely, 2^27389961 is an apocalyptic number.

It is an amenable number.

27389961 is a deficient number, since it is larger than the sum of its proper divisors (13270839).

27389961 is a wasteful number, since it uses less digits than its factorization.

27389961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085 (or 2079 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 27389961 is about 5233.5419172870. The cubic root of 27389961 is about 301.4374019196.

The spelling of 27389961 in words is "twenty-seven million, three hundred eighty-nine thousand, nine hundred sixty-one".