1329387768 has 64 divisors (see below), whose sum is σ = 3700144800. Its totient is φ = 442241280.

The previous prime is 1329387757. The next prime is 1329387769. The reversal of 1329387768 is 8677839231.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329387769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106630 + ... + 118442.

Almost surely, 2^1329387768 is an apocalyptic number.

1329387768 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 1329387768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1850072400).

1329387768 is an abundant number, since it is smaller than the sum of its proper divisors (2370757032).

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

1329387768 is a wasteful number, since it uses less digits than its factorization.

1329387768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12349 (or 12339 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 1329387768 is about 36460.7702606514. The cubic root of 1329387768 is about 1099.5556795040. Note that the first 3 decimals are identical.

The spelling of 1329387768 in words is "one billion, three hundred twenty-nine million, three hundred eighty-seven thousand, seven hundred sixty-eight".