1318252728 has 128 divisors (see below), whose sum is σ = 3728793600. Its totient is φ = 387623808.

The previous prime is 1318252723. The next prime is 1318252759. The reversal of 1318252728 is 8272528131.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318252723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1212201 + ... + 1213287.

It is an arithmetic number, because the mean of its divisors is an integer number (29131200).

Almost surely, 2^1318252728 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 1318252728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1864396800).

1318252728 is an abundant number, since it is smaller than the sum of its proper divisors (2410540872).

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

1318252728 is a wasteful number, since it uses less digits than its factorization.

1318252728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1128 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 1318252728 is about 36307.7502470203. The cubic root of 1318252728 is about 1096.4770841969.

It can be divided in two parts, 13182 and 52728, that multiplied together give a square (695060496 = 26364²).

The spelling of 1318252728 in words is "one billion, three hundred eighteen million, two hundred fifty-two thousand, seven hundred twenty-eight".