320441287 has 4 divisors (see below), whose sum is σ = 322746760. Its totient is φ = 318135816.

The previous prime is 320441263. The next prime is 320441293. The reversal of 320441287 is 782144023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320441287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320441227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152528 + ... + 1152805.

It is an arithmetic number, because the mean of its divisors is an integer number (80686690).

Almost surely, 2^320441287 is an apocalyptic number.

320441287 is a deficient number, since it is larger than the sum of its proper divisors (2305473).

320441287 is a wasteful number, since it uses less digits than its factorization.

320441287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305472.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 320441287 is about 17900.8739172142. The cubic root of 320441287 is about 684.3046468189.

The spelling of 320441287 in words is "three hundred twenty million, four hundred forty-one thousand, two hundred eighty-seven".