13128996 has 48 divisors (see below), whose sum is σ = 32739840. Its totient is φ = 4085760.

The previous prime is 13128991. The next prime is 13129063. The reversal of 13128996 is 69982131.

It is not an unprimeable number, because it can be changed into a prime (13128991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10180 + ... + 11396.

It is an arithmetic number, because the mean of its divisors is an integer number (682080).

Almost surely, 2^13128996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13128996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16369920).

13128996 is an abundant number, since it is smaller than the sum of its proper divisors (19610844).

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

13128996 is a wasteful number, since it uses less digits than its factorization.

13128996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284 (or 1282 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 13128996 is about 3623.3956449717. The cubic root of 13128996 is about 235.9086355139.

The spelling of 13128996 in words is "thirteen million, one hundred twenty-eight thousand, nine hundred ninety-six".