1317047028 has 96 divisors (see below), whose sum is σ = 3474014208. Its totient is φ = 384739200.

The previous prime is 1317046937. The next prime is 1317047041. The reversal of 1317047028 is 8207407131.

It is a happy number.

It is a super-2 number, since 2×1317047028² = 3469225747927265568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 1317047028.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1501326 + ... + 1502202.

It is an arithmetic number, because the mean of its divisors is an integer number (36187648).

Almost surely, 2^1317047028 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 1317047028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737007104).

1317047028 is an abundant number, since it is smaller than the sum of its proper divisors (2156967180).

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

1317047028 is a wasteful number, since it uses less digits than its factorization.

1317047028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 1291 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 1317047028 is about 36291.1425557256. The cubic root of 1317047028 is about 1096.1426956924.

The spelling of 1317047028 in words is "one billion, three hundred seventeen million, forty-seven thousand, twenty-eight".