11989942272 has 480 divisors, whose sum is σ = 44627352000. Its totient is φ = 3114270720.

The previous prime is 11989942219. The next prime is 11989942309. The reversal of 11989942272 is 27224998911.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1089994747 + ... + 1089994757.

It is an arithmetic number, because the mean of its divisors is an integer number (92973650).

Almost surely, 2^11989942272 is an apocalyptic number.

11989942272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

11989942272 is a droll number since its even prime factors and its odd prime factors have the same sum.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11989942272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22313676000).

11989942272 is an abundant number, since it is smaller than the sum of its proper divisors (32637409728).

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

11989942272 is an frugal number, since it uses more digits than its factorization.

11989942272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 23 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The spelling of 11989942272 in words is "eleven billion, nine hundred eighty-nine million, nine hundred forty-two thousand, two hundred seventy-two".