320173456 has 40 divisors (see below), whose sum is σ = 662457600. Its totient is φ = 149573760.

The previous prime is 320173453. The next prime is 320173481. The reversal of 320173456 is 654371023.

It is a super-2 number, since 2×320173456² = 205022083853967872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (320173453) 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 7 ways as a sum of consecutive naturals, for example, 3255 + ... + 25513.

It is an arithmetic number, because the mean of its divisors is an integer number (16561440).

Almost surely, 2^320173456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320173456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331228800).

320173456 is an abundant number, since it is smaller than the sum of its proper divisors (342284144).

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

320173456 is a wasteful number, since it uses less digits than its factorization.

320173456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22327 (or 22321 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 320173456 is about 17893.3914057677. The cubic root of 320173456 is about 684.1139420091.

The spelling of 320173456 in words is "three hundred twenty million, one hundred seventy-three thousand, four hundred fifty-six".