27490105 has 8 divisors (see below), whose sum is σ = 34928712. Its totient is φ = 20698368.

The previous prime is 27490063. The next prime is 27490109. The reversal of 27490105 is 50109472.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11641744 + 15848361 = 3412^2 + 3981^2 .

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 27490105 - 2⁷ = 27489977 is a prime.

It is a super-2 number, since 2×27490105² = 1511411745822050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27490109) 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, 161622 + ... + 161791.

It is an arithmetic number, because the mean of its divisors is an integer number (4366089).

Almost surely, 2^27490105 is an apocalyptic number.

It is an amenable number.

27490105 is a deficient number, since it is larger than the sum of its proper divisors (7438607).

27490105 is a wasteful number, since it uses less digits than its factorization.

27490105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323435.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 27490105 is about 5243.1007047357. The cubic root of 27490105 is about 301.8043299258.

Adding to 27490105 its reverse (50109472), we get a palindrome (77599577).

The spelling of 27490105 in words is "twenty-seven million, four hundred ninety thousand, one hundred five".