1329999948 has 36 divisors (see below), whose sum is σ = 3418931880. Its totient is φ = 435818496.

The previous prime is 1329999917. The next prime is 1329999959. The reversal of 1329999948 is 8499999231.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 310965 + ... + 315212.

It is an arithmetic number, because the mean of its divisors is an integer number (94970330).

Almost surely, 2^1329999948 is an apocalyptic number.

1329999948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1329999948 is an abundant number, since it is smaller than the sum of its proper divisors (2088931932).

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

1329999948 is a wasteful number, since it uses less digits than its factorization.

1329999948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626246 (or 626241 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 63.

The square root of 1329999948 is about 36469.1643446899. The cubic root of 1329999948 is about 1099.7244345540.

The spelling of 1329999948 in words is "one billion, three hundred twenty-nine million, nine hundred ninety-nine thousand, nine hundred forty-eight".