1311442428 has 48 divisors (see below), whose sum is σ = 3199343616. Its totient is φ = 417320640.

The previous prime is 1311442427. The next prime is 1311442463. The reversal of 1311442428 is 8242441131.

It is a junction number, because it is equal to n+sod(n) for n = 1311442395 and 1311442404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311442427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144925 + ... + 153707.

It is an arithmetic number, because the mean of its divisors is an integer number (66652992).

Almost surely, 2^1311442428 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 1311442428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1599671808).

1311442428 is an abundant number, since it is smaller than the sum of its proper divisors (1887901188).

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

1311442428 is a wasteful number, since it uses less digits than its factorization.

1311442428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9354 (or 9352 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 1311442428 is about 36213.8430437864. The cubic root of 1311442428 is about 1094.5856325029.

Adding to 1311442428 its reverse (8242441131), we get a palindrome (9553883559).

The spelling of 1311442428 in words is "one billion, three hundred eleven million, four hundred forty-two thousand, four hundred twenty-eight".