320243040000 has 540 divisors, whose sum is σ = 1242632086696. Its totient is φ = 78824448000.

The previous prime is 320243039981. The next prime is 320243040023. The reversal of 320243040000 is 40342023.

320243040000 is a `hidden beast` number, since 3 + 20 + 243 + 0 + 400 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 18711447 + ... + 18728553.

Almost surely, 2^320243040000 is an apocalyptic number.

320243040000 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 320243040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (621316043348).

320243040000 is an abundant number, since it is smaller than the sum of its proper divisors (922389046696).

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

320243040000 is a wasteful number, since it uses less digits than its factorization.

320243040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17162 (or 17130 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

Adding to 320243040000 its reverse (40342023), we get a palindrome (320283382023).

The spelling of 320243040000 in words is "three hundred twenty billion, two hundred forty-three million, forty thousand".