11978792280 has 768 divisors, whose sum is σ = 51429530880. Its totient is φ = 2346319872.

The previous prime is 11978792261. The next prime is 11978792321. The reversal of 11978792280 is 8229787911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 76297962 + ... + 76298118.

It is an arithmetic number, because the mean of its divisors is an integer number (66965535).

Almost surely, 2^11978792280 is an apocalyptic number.

11978792280 is a gapful number since it is divisible by the number (10) 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 11978792280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25714765440).

11978792280 is an abundant number, since it is smaller than the sum of its proper divisors (39450738600).

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

11978792280 is a wasteful number, since it uses less digits than its factorization.

11978792280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 11978792280 in words is "eleven billion, nine hundred seventy-eight million, seven hundred ninety-two thousand, two hundred eighty".