321040244040 has 128 divisors (see below), whose sum is σ = 1005188832000. Its totient is φ = 81872778240.

The previous prime is 321040244033. The next prime is 321040244051. The reversal of 321040244040 is 40442040123.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 321040244040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22682886 + ... + 22697034.

It is an arithmetic number, because the mean of its divisors is an integer number (7853037750).

Almost surely, 2^321040244040 is an apocalyptic number.

321040244040 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 321040244040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (502594416000).

321040244040 is an abundant number, since it is smaller than the sum of its proper divisors (684148587960).

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

321040244040 is a wasteful number, since it uses less digits than its factorization.

321040244040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22407 (or 22403 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 321040244040 its reverse (40442040123), we get a palindrome (361482284163).

The spelling of 321040244040 in words is "three hundred twenty-one billion, forty million, two hundred forty-four thousand, forty".