320243386 has 16 divisors (see below), whose sum is σ = 492259680. Its totient is φ = 156198640.

The previous prime is 320243381. The next prime is 320243389. The reversal of 320243386 is 683342023.

It is not an unprimeable number, because it can be changed into a prime (320243381) 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, 5100 + ... + 25816.

It is an arithmetic number, because the mean of its divisors is an integer number (30766230).

Almost surely, 2^320243386 is an apocalyptic number.

320243386 is a deficient number, since it is larger than the sum of its proper divisors (172016294).

320243386 is a wasteful number, since it uses less digits than its factorization.

320243386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20909.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 320243386 is about 17895.3453724705. The cubic root of 320243386 is about 684.1637448108.

The spelling of 320243386 in words is "three hundred twenty million, two hundred forty-three thousand, three hundred eighty-six".