11783978928 has 80 divisors (see below), whose sum is σ = 33853388800. Its totient is φ = 3924624960.

The previous prime is 11783978917. The next prime is 11783978939. The reversal of 11783978928 is 82987938711.

It is an interprime number because it is at equal distance from previous prime (11783978917) and next prime (11783978939).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520713 + ... + 542871.

It is an arithmetic number, because the mean of its divisors is an integer number (423167360).

Almost surely, 2^11783978928 is an apocalyptic number.

11783978928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11783978928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16926694400).

11783978928 is an abundant number, since it is smaller than the sum of its proper divisors (22069409872).

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

11783978928 is a wasteful number, since it uses less digits than its factorization.

11783978928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23407 (or 23395 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 63.

The spelling of 11783978928 in words is "eleven billion, seven hundred eighty-three million, nine hundred seventy-eight thousand, nine hundred twenty-eight".