1313012028 has 12 divisors (see below), whose sum is σ = 3063694760. Its totient is φ = 437670672.

The previous prime is 1313012027. The next prime is 1313012039. The reversal of 1313012028 is 8202103131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1313011995 and 1313012013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313012027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54708823 + ... + 54708846.

Almost surely, 2^1313012028 is an apocalyptic number.

It is an amenable number.

1313012028 is an abundant number, since it is smaller than the sum of its proper divisors (1750682732).

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

1313012028 is a wasteful number, since it uses less digits than its factorization.

1313012028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109417676 (or 109417674 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1313012028 is about 36235.5078341673. The cubic root of 1313012028 is about 1095.0221433774.

Adding to 1313012028 its reverse (8202103131), we get a palindrome (9515115159).

The spelling of 1313012028 in words is "one billion, three hundred thirteen million, twelve thousand, twenty-eight".