189569856 has 112 divisors (see below), whose sum is σ = 607015296. Its totient is φ = 50970624.

The previous prime is 189569851. The next prime is 189569879. The reversal of 189569856 is 658965981.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 189569796 and 189569805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189569851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18700 + ... + 26996.

Almost surely, 2^189569856 is an apocalyptic number.

189569856 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 189569856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303507648).

189569856 is an abundant number, since it is smaller than the sum of its proper divisors (417445440).

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

189569856 is a wasteful number, since it uses less digits than its factorization.

189569856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8336 (or 8326 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 57.

The square root of 189569856 is about 13768.4369483250. The cubic root of 189569856 is about 574.4555461319.

The spelling of 189569856 in words is "one hundred eighty-nine million, five hundred sixty-nine thousand, eight hundred fifty-six".