1002320440 has 96 divisors (see below), whose sum is σ = 2539842480. Its totient is φ = 355520000.

The previous prime is 1002320413. The next prime is 1002320447. The reversal of 1002320440 is 440232001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002320447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195915 + ... + 200965.

Almost surely, 2^1002320440 is an apocalyptic number.

1002320440 is a gapful number since it is divisible by the number (10) 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 1002320440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1269921240).

1002320440 is an abundant number, since it is smaller than the sum of its proper divisors (1537522040).

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

1002320440 is a wasteful number, since it uses less digits than its factorization.

1002320440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5125 (or 5110 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1002320440 is about 31659.4447203358. Note that the first 3 decimals coincide. The cubic root of 1002320440 is about 1000.7728824988.

Adding to 1002320440 its reverse (440232001), we get a palindrome (1442552441).

The spelling of 1002320440 in words is "one billion, two million, three hundred twenty thousand, four hundred forty".