320440347 has 32 divisors (see below), whose sum is σ = 498048000. Its totient is φ = 203233536.

The previous prime is 320440319. The next prime is 320440391. The reversal of 320440347 is 743044023.

It is not a de Polignac number, because 320440347 - 2²⁰ = 319391771 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 320440347.

It is not an unprimeable number, because it can be changed into a prime (320440147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122283 + ... + 124875.

It is an arithmetic number, because the mean of its divisors is an integer number (15564000).

Almost surely, 2^320440347 is an apocalyptic number.

320440347 is a deficient number, since it is larger than the sum of its proper divisors (177607653).

320440347 is a wasteful number, since it uses less digits than its factorization.

320440347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824 (or 2818 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 27.

The square root of 320440347 is about 17900.8476614936. The cubic root of 320440347 is about 684.3039776926.

The spelling of 320440347 in words is "three hundred twenty million, four hundred forty thousand, three hundred forty-seven".