27261389 has 4 divisors (see below), whose sum is σ = 27442080. Its totient is φ = 27080700.

The previous prime is 27261349. The next prime is 27261407. The reversal of 27261389 is 98316272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27261389 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 (27261349) 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, 90119 + ... + 90420.

It is an arithmetic number, because the mean of its divisors is an integer number (6860520).

Almost surely, 2^27261389 is an apocalyptic number.

It is an amenable number.

27261389 is a deficient number, since it is larger than the sum of its proper divisors (180691).

27261389 is a wasteful number, since it uses less digits than its factorization.

27261389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180690.

The product of its digits is 36288, while the sum is 38.

The square root of 27261389 is about 5221.2440088546. The cubic root of 27261389 is about 300.9649999958.

The spelling of 27261389 in words is "twenty-seven million, two hundred sixty-one thousand, three hundred eighty-nine".