1331002320 has 40 divisors (see below), whose sum is σ = 4126107936. Its totient is φ = 354933888.

The previous prime is 1331002319. The next prime is 1331002327. The reversal of 1331002320 is 232001331.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1331002320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331002327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2772682 + ... + 2773161.

Almost surely, 2^1331002320 is an apocalyptic number.

1331002320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331002320 is an abundant number, since it is smaller than the sum of its proper divisors (2795105616).

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

1331002320 is a wasteful number, since it uses less digits than its factorization.

1331002320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5545859 (or 5545853 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1331002320 is about 36482.9044896373. The cubic root of 1331002320 is about 1100.0006391181. Note that the first 3 decimals are identical.

Adding to 1331002320 its reverse (232001331), we get a palindrome (1563003651).

The spelling of 1331002320 in words is "one billion, three hundred thirty-one million, two thousand, three hundred twenty".