1311628 has 12 divisors (see below), whose sum is σ = 2308600. Its totient is φ = 652032.

The previous prime is 1311623. The next prime is 1311643. The reversal of 1311628 is 8261131.

It is a junction number, because it is equal to n+sod(n) for n = 1311599 and 1311608.

It is not an unprimeable number, because it can be changed into a prime (1311623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78 + ... + 1621.

2^1311628 is an apocalyptic number.

It is an amenable number.

1311628 is a deficient number, since it is larger than the sum of its proper divisors (996972).

1311628 is a wasteful number, since it uses less digits than its factorization.

1311628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896 (or 1894 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 1311628 is about 1145.2632885062. The cubic root of 1311628 is about 109.4637258829.

Adding to 1311628 its reverse (8261131), we get a palindrome (9572759).

The spelling of 1311628 in words is "one million, three hundred eleven thousand, six hundred twenty-eight".