27670321 has 16 divisors (see below), whose sum is σ = 33776640. Its totient is φ = 22155840.

The previous prime is 27670319. The next prime is 27670337. The reversal of 27670321 is 12307672.

It is not a de Polignac number, because 27670321 - 2¹ = 27670319 is a prime.

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

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 27670321.

It is not an unprimeable number, because it can be changed into a prime (27670421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4095 + ... + 8491.

It is an arithmetic number, because the mean of its divisors is an integer number (2111040).

Almost surely, 2^27670321 is an apocalyptic number.

It is an amenable number.

27670321 is a deficient number, since it is larger than the sum of its proper divisors (6106319).

27670321 is a wasteful number, since it uses less digits than its factorization.

27670321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 27670321 is about 5260.2586438311. The cubic root of 27670321 is about 302.4624036330.

Adding to 27670321 its reverse (12307672), we get a palindrome (39977993).

The spelling of 27670321 in words is "twenty-seven million, six hundred seventy thousand, three hundred twenty-one".