11819929728 has 128 divisors (see below), whose sum is σ = 33808104000. Its totient is φ = 3645243392.

The previous prime is 11819929727. The next prime is 11819929739. The reversal of 11819929728 is 82792991811.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (11819929727) 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, 369808 + ... + 400496.

Almost surely, 2^11819929728 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 11819929728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16904052000).

11819929728 is an abundant number, since it is smaller than the sum of its proper divisors (21988174272).

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

11819929728 is a wasteful number, since it uses less digits than its factorization.

11819929728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30782 (or 30770 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 57.

The spelling of 11819929728 in words is "eleven billion, eight hundred nineteen million, nine hundred twenty-nine thousand, seven hundred twenty-eight".