27490813 has 12 divisors (see below), whose sum is σ = 32074812. Its totient is φ = 23493120.

The previous prime is 27490807. The next prime is 27490849. The reversal of 27490813 is 31809472.

It can be written as a sum of positive squares in 2 ways, for example, as 9018009 + 18472804 = 3003^2 + 4298^2 .

It is not a de Polignac number, because 27490813 - 2¹⁷ = 27359741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27490013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21981 + ... + 23197.

It is an arithmetic number, because the mean of its divisors is an integer number (2672901).

Almost surely, 2^27490813 is an apocalyptic number.

It is an amenable number.

27490813 is a deficient number, since it is larger than the sum of its proper divisors (4583999).

27490813 is a wasteful number, since it uses less digits than its factorization.

27490813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 27490813 is about 5243.1682216004. The cubic root of 27490813 is about 301.8069208658.

The spelling of 27490813 in words is "twenty-seven million, four hundred ninety thousand, eight hundred thirteen".