1312404320 has 48 divisors (see below), whose sum is σ = 3102932448. Its totient is φ = 524559360.

The previous prime is 1312404299. The next prime is 1312404323. The reversal of 1312404320 is 234042131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1312404292 and 1312404301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312404323) 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, 293300 + ... + 297740.

It is an arithmetic number, because the mean of its divisors is an integer number (64644426).

Almost surely, 2^1312404320 is an apocalyptic number.

1312404320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312404320 is an abundant number, since it is smaller than the sum of its proper divisors (1790528128).

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

1312404320 is a wasteful number, since it uses less digits than its factorization.

1312404320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6303 (or 6295 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1312404320 is about 36227.1213319524. The cubic root of 1312404320 is about 1094.8531790943.

Adding to 1312404320 its reverse (234042131), we get a palindrome (1546446451).

The spelling of 1312404320 in words is "one billion, three hundred twelve million, four hundred four thousand, three hundred twenty".