27489397 has 8 divisors (see below), whose sum is σ = 29867544. Its totient is φ = 25148928.

The previous prime is 27489383. The next prime is 27489437. The reversal of 27489397 is 79398472.

It can be written as a sum of positive squares in 4 ways, for example, as 21316 + 27468081 = 146^2 + 5241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27489397 - 2¹⁹ = 26965109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27489397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27489337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7888 + ... + 10825.

It is an arithmetic number, because the mean of its divisors is an integer number (3733443).

Almost surely, 2^27489397 is an apocalyptic number.

It is an amenable number.

27489397 is a deficient number, since it is larger than the sum of its proper divisors (2378147).

27489397 is a wasteful number, since it uses less digits than its factorization.

27489397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18839.

The product of its digits is 762048, while the sum is 49.

The square root of 27489397 is about 5243.0331870016. The cubic root of 27489397 is about 301.8017389414.

The spelling of 27489397 in words is "twenty-seven million, four hundred eighty-nine thousand, three hundred ninety-seven".