320828247 has 12 divisors (see below), whose sum is σ = 479398920. Its totient is φ = 206509968.

The previous prime is 320828213. The next prime is 320828257. The reversal of 320828247 is 742828023.

It is not a de Polignac number, because 320828247 - 2⁷ = 320828119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320828257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 614353 + ... + 614874.

It is an arithmetic number, because the mean of its divisors is an integer number (39949910).

Almost surely, 2^320828247 is an apocalyptic number.

320828247 is a deficient number, since it is larger than the sum of its proper divisors (158570673).

320828247 is a wasteful number, since it uses less digits than its factorization.

320828247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229262 (or 1229259 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 320828247 is about 17911.6790670222. The cubic root of 320828247 is about 684.5799879598.

The spelling of 320828247 in words is "three hundred twenty million, eight hundred twenty-eight thousand, two hundred forty-seven".