1329792640 has 64 divisors (see below), whose sum is σ = 3468057120. Its totient is φ = 483558400.

The previous prime is 1329792637. The next prime is 1329792671. The reversal of 1329792640 is 462979231.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 87406 + ... + 101485.

Almost surely, 2^1329792640 is an apocalyptic number.

1329792640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1329792640 is an abundant number, since it is smaller than the sum of its proper divisors (2138264480).

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

1329792640 is a wasteful number, since it uses less digits than its factorization.

1329792640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188921 (or 188909 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 1329792640 is about 36466.3219971524. The cubic root of 1329792640 is about 1099.6672933189.

The spelling of 1329792640 in words is "one billion, three hundred twenty-nine million, seven hundred ninety-two thousand, six hundred forty".