1312003320 has 64 divisors (see below), whose sum is σ = 3991472640. Its totient is φ = 344937600.

The previous prime is 1312003309. The next prime is 1312003361. The reversal of 1312003320 is 233002131.

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 1312003320.

It is a congruent number.

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, 68476 + ... + 85515.

It is an arithmetic number, because the mean of its divisors is an integer number (62366760).

Almost surely, 2^1312003320 is an apocalyptic number.

1312003320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312003320 is an abundant number, since it is smaller than the sum of its proper divisors (2679469320).

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

1312003320 is a wasteful number, since it uses less digits than its factorization.

1312003320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154076 (or 154072 counting only the distinct ones).

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

The square root of 1312003320 is about 36221.5863816040. The cubic root of 1312003320 is about 1094.7416583683.

Adding to 1312003320 its reverse (233002131), we get a palindrome (1545005451).

The spelling of 1312003320 in words is "one billion, three hundred twelve million, three thousand, three hundred twenty".