189161856 has 192 divisors, whose sum is σ = 621522720. Its totient is φ = 54706176.

The previous prime is 189161851. The next prime is 189161857. The reversal of 189161856 is 658161981.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189161851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254221 + ... + 254963.

Almost surely, 2^189161856 is an apocalyptic number.

189161856 is a gapful number since it is divisible by the number (16) 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 189161856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310761360).

189161856 is an abundant number, since it is smaller than the sum of its proper divisors (432360864).

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

189161856 is a wasteful number, since it uses less digits than its factorization.

189161856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 778 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 189161856 is about 13753.6124709111. The cubic root of 189161856 is about 574.0431278727.

The spelling of 189161856 in words is "one hundred eighty-nine million, one hundred sixty-one thousand, eight hundred fifty-six".