320055426 has 48 divisors (see below), whose sum is σ = 719409600. Its totient is φ = 102713184.

The previous prime is 320055403. The next prime is 320055443. The reversal of 320055426 is 624550023.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 320055426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253585 + ... + 254843.

It is an arithmetic number, because the mean of its divisors is an integer number (14987700).

Almost surely, 2^320055426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320055426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359704800).

320055426 is an abundant number, since it is smaller than the sum of its proper divisors (399354174).

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

320055426 is a wasteful number, since it uses less digits than its factorization.

320055426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783 (or 1780 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 320055426 is about 17890.0929567177. The cubic root of 320055426 is about 684.0298668604.

The spelling of 320055426 in words is "three hundred twenty million, fifty-five thousand, four hundred twenty-six".