320445234 has 80 divisors (see below), whose sum is σ = 743938008. Its totient is φ = 103016448.

The previous prime is 320445227. The next prime is 320445239. The reversal of 320445234 is 432544023.

320445234 is a `hidden beast` number, since 3 + 204 + 452 + 3 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 252333225 + 68112009 = 15885^2 + 8253^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 320445198 and 320445207.

It is not an unprimeable number, because it can be changed into a prime (320445239) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1156704 + ... + 1156980.

Almost surely, 2^320445234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320445234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371969004).

320445234 is an abundant number, since it is smaller than the sum of its proper divisors (423492774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320445234 is a wasteful number, since it uses less digits than its factorization.

320445234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 320445234 is about 17900.9841628889. The cubic root of 320445234 is about 684.3074564228.

Adding to 320445234 its reverse (432544023), we get a palindrome (752989257).

The spelling of 320445234 in words is "three hundred twenty million, four hundred forty-five thousand, two hundred thirty-four".