1329128460 has 96 divisors (see below), whose sum is σ = 4511001600. Its totient is φ = 322211520.

The previous prime is 1329128401. The next prime is 1329128477. The reversal of 1329128460 is 648219231.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105940 + ... + 117819.

It is an arithmetic number, because the mean of its divisors is an integer number (46989600).

Almost surely, 2^1329128460 is an apocalyptic number.

1329128460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1329128460 is an abundant number, since it is smaller than the sum of its proper divisors (3181873140).

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

1329128460 is a wasteful number, since it uses less digits than its factorization.

1329128460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223788 (or 223780 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1329128460 is about 36457.2141009156. The cubic root of 1329128460 is about 1099.4841824004.

The spelling of 1329128460 in words is "one billion, three hundred twenty-nine million, one hundred twenty-eight thousand, four hundred sixty".