320878395 has 16 divisors (see below), whose sum is σ = 570450720. Its totient is φ = 171135072.

The previous prime is 320878391. The next prime is 320878399. The reversal of 320878395 is 593878023.

It is an interprime number because it is at equal distance from previous prime (320878391) and next prime (320878399).

It is not a de Polignac number, because 320878395 - 2² = 320878391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 320878395.

It is not an unprimeable number, because it can be changed into a prime (320878391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1188304 + ... + 1188573.

It is an arithmetic number, because the mean of its divisors is an integer number (35653170).

Almost surely, 2^320878395 is an apocalyptic number.

320878395 is a deficient number, since it is larger than the sum of its proper divisors (249572325).

320878395 is a wasteful number, since it uses less digits than its factorization.

320878395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376891 (or 2376885 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 320878395 is about 17913.0788810857. The cubic root of 320878395 is about 684.6156545291.

The spelling of 320878395 in words is "three hundred twenty million, eight hundred seventy-eight thousand, three hundred ninety-five".