1331185628 has 12 divisors (see below), whose sum is σ = 2430860880. Its totient is φ = 636653952.

The previous prime is 1331185627. The next prime is 1331185673. The reversal of 1331185628 is 8265811331.

It is a junction number, because it is equal to n+sod(n) for n = 1331185591 and 1331185600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331185621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7234613 + ... + 7234796.

It is an arithmetic number, because the mean of its divisors is an integer number (202571740).

Almost surely, 2^1331185628 is an apocalyptic number.

It is an amenable number.

1331185628 is a deficient number, since it is larger than the sum of its proper divisors (1099675252).

1331185628 is a wasteful number, since it uses less digits than its factorization.

1331185628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14469436 (or 14469434 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 1331185628 is about 36485.4166482994. The cubic root of 1331185628 is about 1100.0511348130.

Adding to 1331185628 its reverse (8265811331), we get a palindrome (9596996959).

The spelling of 1331185628 in words is "one billion, three hundred thirty-one million, one hundred eighty-five thousand, six hundred twenty-eight".