320406243 has 8 divisors (see below), whose sum is σ = 429233856. Its totient is φ = 212591400.

The previous prime is 320406209. The next prime is 320406283. The reversal of 320406243 is 342604023.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320406243 - 2⁶ = 320406179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320406283) 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, 252453 + ... + 253718.

It is an arithmetic number, because the mean of its divisors is an integer number (53654232).

Almost surely, 2^320406243 is an apocalyptic number.

320406243 is a deficient number, since it is larger than the sum of its proper divisors (108827613).

320406243 is a wasteful number, since it uses less digits than its factorization.

320406243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506385.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 320406243 is about 17899.8950555583. The cubic root of 320406243 is about 684.2797003391.

It can be divided in two parts, 32040 and 6243, that added together give a palindrome (38283).

The spelling of 320406243 in words is "three hundred twenty million, four hundred six thousand, two hundred forty-three".