320003387 has 8 divisors (see below), whose sum is σ = 352485120. Its totient is φ = 288086760.

The previous prime is 320003357. The next prime is 320003407. The reversal of 320003387 is 783300023.

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 320003387 - 2¹⁰ = 320002363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320003357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140087 + ... + 142352.

It is an arithmetic number, because the mean of its divisors is an integer number (44060640).

Almost surely, 2^320003387 is an apocalyptic number.

320003387 is a deficient number, since it is larger than the sum of its proper divisors (32481733).

320003387 is a wasteful number, since it uses less digits than its factorization.

320003387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282553.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 320003387 is about 17888.6384892758. The cubic root of 320003387 is about 683.9927918657.

The spelling of 320003387 in words is "three hundred twenty million, three thousand, three hundred eighty-seven".