1312304420 has 48 divisors (see below), whose sum is σ = 3154152960. Its totient is φ = 449272704.

The previous prime is 1312304417. The next prime is 1312304447. The reversal of 1312304420 is 244032131.

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 = 1312304392 and 1312304401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94142 + ... + 107178.

It is an arithmetic number, because the mean of its divisors is an integer number (65711520).

Almost surely, 2^1312304420 is an apocalyptic number.

1312304420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312304420 is an abundant number, since it is smaller than the sum of its proper divisors (1841848540).

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

1312304420 is a wasteful number, since it uses less digits than its factorization.

1312304420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13772 (or 13770 counting only the distinct ones).

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

The square root of 1312304420 is about 36225.7425044677. The cubic root of 1312304420 is about 1094.8253983750.

Adding to 1312304420 its reverse (244032131), we get a palindrome (1556336551).

The spelling of 1312304420 in words is "one billion, three hundred twelve million, three hundred four thousand, four hundred twenty".