1161943860 has 576 divisors, whose sum is σ = 4559708160. Its totient is φ = 217728000.

The previous prime is 1161943801. The next prime is 1161943903. The reversal of 1161943860 is 683491611.

It is a super-2 number, since 2×1161943860² = 2700227067583399200, which contains 22 as substring.

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, 19048230 + ... + 19048290.

It is an arithmetic number, because the mean of its divisors is an integer number (7916160).

Almost surely, 2^1161943860 is an apocalyptic number.

1161943860 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 1161943860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2279854080).

1161943860 is an abundant number, since it is smaller than the sum of its proper divisors (3397764300).

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

1161943860 is a wasteful number, since it uses less digits than its factorization.

1161943860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1161943860 is about 34087.2976341628. The cubic root of 1161943860 is about 1051.3041572727.

The spelling of 1161943860 in words is "one billion, one hundred sixty-one million, nine hundred forty-three thousand, eight hundred sixty".