320398647 has 16 divisors (see below), whose sum is σ = 435329280. Its totient is φ = 209563200.

The previous prime is 320398627. The next prime is 320398667. The reversal of 320398647 is 746893023.

It is an interprime number because it is at equal distance from previous prime (320398627) and next prime (320398667).

It is not a de Polignac number, because 320398647 - 2⁸ = 320398391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320398599 and 320398608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320398607) 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, 41379 + ... + 48507.

It is an arithmetic number, because the mean of its divisors is an integer number (27208080).

Almost surely, 2^320398647 is an apocalyptic number.

320398647 is a deficient number, since it is larger than the sum of its proper divisors (114930633).

320398647 is a wasteful number, since it uses less digits than its factorization.

320398647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7414.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 320398647 is about 17899.6828742858. The cubic root of 320398647 is about 684.2742927981.

The spelling of 320398647 in words is "three hundred twenty million, three hundred ninety-eight thousand, six hundred forty-seven".