320240000 has 80 divisors (see below), whose sum is σ = 797416620. Its totient is φ = 128064000.

The previous prime is 320239991. The next prime is 320240027. The reversal of 320240000 is 42023.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 77999 + ... + 82001.

Almost surely, 2^320240000 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 320240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398708310).

320240000 is an abundant number, since it is smaller than the sum of its proper divisors (477176620).

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

320240000 is an frugal number, since it uses more digits than its factorization.

320240000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037 (or 4010 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 320240000 is about 17895.2507666140. The cubic root of 320240000 is about 684.1613335338.

Adding to 320240000 its reverse (42023), we get a palindrome (320282023).

The spelling of 320240000 in words is "three hundred twenty million, two hundred forty thousand".