1368444168 has 144 divisors (see below), whose sum is σ = 4643091180. Its totient is φ = 360896256.

The previous prime is 1368444137. The next prime is 1368444173. The reversal of 1368444168 is 8614448631.

It can be written as a sum of positive squares in 2 ways, for example, as 1070467524 + 297976644 = 32718^2 + 17262^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30946 + ... + 60782.

Almost surely, 2^1368444168 is an apocalyptic number.

1368444168 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 1368444168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2321545590).

1368444168 is an abundant number, since it is smaller than the sum of its proper divisors (3274647012).

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

1368444168 is a wasteful number, since it uses less digits than its factorization.

1368444168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29876 (or 29862 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 1368444168 is about 36992.4879941861. The cubic root of 1368444168 is about 1110.2199515430.

The spelling of 1368444168 in words is "one billion, three hundred sixty-eight million, four hundred forty-four thousand, one hundred sixty-eight".