327640405 has 32 divisors (see below), whose sum is σ = 449452800. Its totient is φ = 227791872.

The previous prime is 327640399. The next prime is 327640433. The reversal of 327640405 is 504046723.

It is a cyclic number.

It is not a de Polignac number, because 327640405 - 2⁵ = 327640373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53806 + ... + 59584.

It is an arithmetic number, because the mean of its divisors is an integer number (14045400).

Almost surely, 2^327640405 is an apocalyptic number.

It is an amenable number.

327640405 is a deficient number, since it is larger than the sum of its proper divisors (121812395).

327640405 is a wasteful number, since it uses less digits than its factorization.

327640405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5853.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 327640405 is about 18100.8398976401. The cubic root of 327640405 is about 689.3913311886.

It can be divided in two parts, 3276 and 40405, that added together give a square (43681 = 209²).

The spelling of 327640405 in words is "three hundred twenty-seven million, six hundred forty thousand, four hundred five".