11938891860 has 192 divisors, whose sum is σ = 42508247040. Its totient is φ = 2725107840.

The previous prime is 11938891843. The next prime is 11938891931. The reversal of 11938891860 is 6819883911.

11938891860 is a `hidden beast` number, since 119 + 388 + 91 + 8 + 60 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 11938891797 and 11938891806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3441847 + ... + 3445313.

It is an arithmetic number, because the mean of its divisors is an integer number (221397120).

Almost surely, 2^11938891860 is an apocalyptic number.

11938891860 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 11938891860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21254123520).

11938891860 is an abundant number, since it is smaller than the sum of its proper divisors (30569355180).

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

11938891860 is a wasteful number, since it uses less digits than its factorization.

11938891860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4403 (or 4395 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The spelling of 11938891860 in words is "eleven billion, nine hundred thirty-eight million, eight hundred ninety-one thousand, eight hundred sixty".