11988131040 has 144 divisors (see below), whose sum is σ = 41907496176. Its totient is φ = 3118848000.

The previous prime is 11988130981. The next prime is 11988131053. The reversal of 11988131040 is 4013188911.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×11988131040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 11988130986 and 11988131004.

It is a congruent number.

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, 42486 + ... + 160565.

It is an arithmetic number, because the mean of its divisors is an integer number (291024279).

Almost surely, 2^11988131040 is an apocalyptic number.

11988131040 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 11988131040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20953748088).

11988131040 is an abundant number, since it is smaller than the sum of its proper divisors (29919365136).

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

11988131040 is a wasteful number, since it uses less digits than its factorization.

11988131040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203113 (or 203102 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 11988131040 in words is "eleven billion, nine hundred eighty-eight million, one hundred thirty-one thousand, forty".