1312042228 has 48 divisors (see below), whose sum is σ = 2715552000. Its totient is φ = 554342880.

The previous prime is 1312042219. The next prime is 1312042243. The reversal of 1312042228 is 8222402131.

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, 90678 + ... + 104146.

It is an arithmetic number, because the mean of its divisors is an integer number (56574000).

Almost surely, 2^1312042228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312042228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1357776000).

1312042228 is an abundant number, since it is smaller than the sum of its proper divisors (1403509772).

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

1312042228 is a wasteful number, since it uses less digits than its factorization.

1312042228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13565 (or 13549 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1312042228 is about 36222.1234606697. The cubic root of 1312042228 is about 1094.7524799332.

Adding to 1312042228 its reverse (8222402131), we get a palindrome (9534444359).

The spelling of 1312042228 in words is "one billion, three hundred twelve million, forty-two thousand, two hundred twenty-eight".