320778434 has 8 divisors (see below), whose sum is σ = 481441980. Its totient is φ = 160297776.

The previous prime is 320778433. The next prime is 320778529. The reversal of 320778434 is 434877023.

320778434 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 236083225 + 84695209 = 15365^2 + 9203^2 .

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

It is not an unprimeable number, because it can be changed into a prime (320778433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41249 + ... + 48404.

Almost surely, 2^320778434 is an apocalyptic number.

320778434 is a deficient number, since it is larger than the sum of its proper divisors (160663546).

320778434 is a wasteful number, since it uses less digits than its factorization.

320778434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91444.

The product of its (nonzero) digits is 112896, while the sum is 38.

The square root of 320778434 is about 17910.2884957222. The cubic root of 320778434 is about 684.5445559716.

The spelling of 320778434 in words is "three hundred twenty million, seven hundred seventy-eight thousand, four hundred thirty-four".