1368289728 has 168 divisors, whose sum is σ = 4243730400. Its totient is φ = 419014656.

The previous prime is 1368289721. The next prime is 1368289733. The reversal of 1368289728 is 8279828631.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368289721) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2687938 + ... + 2688446.

It is an arithmetic number, because the mean of its divisors is an integer number (25260300).

Almost surely, 2^1368289728 is an apocalyptic number.

1368289728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1368289728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2121865200).

1368289728 is an abundant number, since it is smaller than the sum of its proper divisors (2875440672).

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

1368289728 is a wasteful number, since it uses less digits than its factorization.

1368289728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 886 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 1368289728 is about 36990.4004844500. The cubic root of 1368289728 is about 1110.1781842026.

The spelling of 1368289728 in words is "one billion, three hundred sixty-eight million, two hundred eighty-nine thousand, seven hundred twenty-eight".