1329716980 has 12 divisors (see below), whose sum is σ = 2792405700. Its totient is φ = 531886784.

The previous prime is 1329716977. The next prime is 1329716981. The reversal of 1329716980 is 896179231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 585736804 + 743980176 = 24202^2 + 27276^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1329716980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329716981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33242905 + ... + 33242944.

It is an arithmetic number, because the mean of its divisors is an integer number (232700475).

Almost surely, 2^1329716980 is an apocalyptic number.

1329716980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1329716980 is an abundant number, since it is smaller than the sum of its proper divisors (1462688720).

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

1329716980 is a wasteful number, since it uses less digits than its factorization.

1329716980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66485858 (or 66485856 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 1329716980 is about 36465.2845868505. The cubic root of 1329716980 is about 1099.6464373340.

The spelling of 1329716980 in words is "one billion, three hundred twenty-nine million, seven hundred sixteen thousand, nine hundred eighty".