320043840240 has 160 divisors (see below), whose sum is σ = 1019443876416. Its totient is φ = 82998190080.

The previous prime is 320043840209. The next prime is 320043840241. The reversal of 320043840240 is 42048340023.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 320043840198 and 320043840207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320043840241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21242310 + ... + 21257370.

Almost surely, 2^320043840240 is an apocalyptic number.

320043840240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320043840240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (509721938208).

320043840240 is an abundant number, since it is smaller than the sum of its proper divisors (699400036176).

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

320043840240 is a wasteful number, since it uses less digits than its factorization.

320043840240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17507 (or 17501 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The spelling of 320043840240 in words is "three hundred twenty billion, forty-three million, eight hundred forty thousand, two hundred forty".