1328902889 has 4 divisors (see below), whose sum is σ = 1330970256. Its totient is φ = 1326835524.

The previous prime is 1328902879. The next prime is 1328902891. The reversal of 1328902889 is 9882098231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9882098231 = 16417 ⋅601943.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328902889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1328902829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1032719 + ... + 1034004.

It is an arithmetic number, because the mean of its divisors is an integer number (332742564).

Almost surely, 2^1328902889 is an apocalyptic number.

It is an amenable number.

1328902889 is a deficient number, since it is larger than the sum of its proper divisors (2067367).

1328902889 is an equidigital number, since it uses as much as digits as its factorization.

1328902889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067366.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 1328902889 is about 36454.1203295320. The cubic root of 1328902889 is about 1099.4219797903.

The spelling of 1328902889 in words is "one billion, three hundred twenty-eight million, nine hundred two thousand, eight hundred eighty-nine".