320123023040 has 112 divisors (see below), whose sum is σ = 805273492320. Its totient is φ = 120877424640.

The previous prime is 320123023019. The next prime is 320123023063. The reversal of 320123023040 is 40320321023.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1614794 + ... + 1802166.

Almost surely, 2^320123023040 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 320123023040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402636746160).

320123023040 is an abundant number, since it is smaller than the sum of its proper divisors (485150469280).

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

320123023040 is a wasteful number, since it uses less digits than its factorization.

320123023040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187690 (or 187680 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 320123023040 its reverse (40320321023), we get a palindrome (360443344063).

The spelling of 320123023040 in words is "three hundred twenty billion, one hundred twenty-three million, twenty-three thousand, forty".