1329981028 has 12 divisors (see below), whose sum is σ = 2328383232. Its totient is φ = 664728680.

The previous prime is 1329980989. The next prime is 1329981031. The reversal of 1329981028 is 8201899231.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53800 + ... + 74527.

It is an arithmetic number, because the mean of its divisors is an integer number (194031936).

Almost surely, 2^1329981028 is an apocalyptic number.

It is an amenable number.

1329981028 is a deficient number, since it is larger than the sum of its proper divisors (998402204).

1329981028 is a wasteful number, since it uses less digits than its factorization.

1329981028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130922 (or 130920 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 1329981028 is about 36468.9049465432. The cubic root of 1329981028 is about 1099.7192197957.

The spelling of 1329981028 in words is "one billion, three hundred twenty-nine million, nine hundred eighty-one thousand, twenty-eight".