1328905100 has 36 divisors (see below), whose sum is σ = 2888606784. Its totient is φ = 530662080.

The previous prime is 1328905043. The next prime is 1328905111. The reversal of 1328905100 is 15098231.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49754 + ... + 71646.

Almost surely, 2^1328905100 is an apocalyptic number.

1328905100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1328905100 is an abundant number, since it is smaller than the sum of its proper divisors (1559701684).

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

1328905100 is a wasteful number, since it uses less digits than its factorization.

1328905100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22514 (or 22507 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1328905100 is about 36454.1506553095. The cubic root of 1328905100 is about 1099.4225895215.

The spelling of 1328905100 in words is "one billion, three hundred twenty-eight million, nine hundred five thousand, one hundred".