320840077740 has 192 divisors, whose sum is σ = 1106970568704. Its totient is φ = 67613755392.

The previous prime is 320840077681. The next prime is 320840077757. The reversal of 320840077740 is 47770048023.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 320840077692 and 320840077701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4644937 + ... + 4713503.

It is an arithmetic number, because the mean of its divisors is an integer number (5765471712).

Almost surely, 2^320840077740 is an apocalyptic number.

320840077740 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 320840077740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (553485284352).

320840077740 is an abundant number, since it is smaller than the sum of its proper divisors (786130490964).

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

320840077740 is a wasteful number, since it uses less digits than its factorization.

320840077740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69456 (or 69454 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 42.

The spelling of 320840077740 in words is "three hundred twenty billion, eight hundred forty million, seventy-seven thousand, seven hundred forty".