1368617328 has 120 divisors (see below), whose sum is σ = 4136037360. Its totient is φ = 419973120.

The previous prime is 1368617321. The next prime is 1368617333. The reversal of 1368617328 is 8237168631.

1368617328 is a `hidden beast` number, since 1 + 3 + 6 + 8 + 617 + 3 + 28 = 666.

It is a super-2 number, since 2×1368617328² = 3746226781003719168, which contains 22 as substring.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368617321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 918408 + ... + 919896.

It is an arithmetic number, because the mean of its divisors is an integer number (34466978).

Almost surely, 2^1368617328 is an apocalyptic number.

1368617328 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 1368617328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2068018680).

1368617328 is an abundant number, since it is smaller than the sum of its proper divisors (2767420032).

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

1368617328 is a wasteful number, since it uses less digits than its factorization.

1368617328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007 (or 1998 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1368617328 is about 36994.8283953312. The cubic root of 1368617328 is about 1110.2667778545.

The spelling of 1368617328 in words is "one billion, three hundred sixty-eight million, six hundred seventeen thousand, three hundred twenty-eight".