1312023320 has 32 divisors (see below), whose sum is σ = 2966062320. Its totient is φ = 522318720.

The previous prime is 1312023313. The next prime is 1312023371. The reversal of 1312023320 is 233202131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69287 + ... + 86166.

Almost surely, 2^1312023320 is an apocalyptic number.

1312023320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312023320 is an abundant number, since it is smaller than the sum of its proper divisors (1654039000).

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

1312023320 is a wasteful number, since it uses less digits than its factorization.

1312023320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155675 (or 155671 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1312023320 is about 36221.8624590178. The cubic root of 1312023320 is about 1094.7472210376.

Adding to 1312023320 its reverse (233202131), we get a palindrome (1545225451).

The spelling of 1312023320 in words is "one billion, three hundred twelve million, twenty-three thousand, three hundred twenty".