320278431 has 8 divisors (see below), whose sum is σ = 465859584. Its totient is φ = 194108120.

The previous prime is 320278423. The next prime is 320278447. The reversal of 320278431 is 134872023.

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 320278431 - 2³ = 320278423 is a prime.

It is a super-2 number, since 2×320278431² = 205156546727643522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320278451) 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 7 ways as a sum of consecutive naturals, for example, 4852671 + ... + 4852736.

It is an arithmetic number, because the mean of its divisors is an integer number (58232448).

Almost surely, 2^320278431 is an apocalyptic number.

320278431 is a deficient number, since it is larger than the sum of its proper divisors (145581153).

320278431 is a wasteful number, since it uses less digits than its factorization.

320278431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9705421.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 320278431 is about 17896.3245109156. The cubic root of 320278431 is about 684.1887004591.

The spelling of 320278431 in words is "three hundred twenty million, two hundred seventy-eight thousand, four hundred thirty-one".