189161588 has 48 divisors (see below), whose sum is σ = 413952000. Its totient is φ = 73478880.

The previous prime is 189161573. The next prime is 189161593. The reversal of 189161588 is 885161981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134513 + ... + 135911.

It is an arithmetic number, because the mean of its divisors is an integer number (8624000).

Almost surely, 2^189161588 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189161588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206976000).

189161588 is an abundant number, since it is smaller than the sum of its proper divisors (224790412).

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

189161588 is a wasteful number, since it uses less digits than its factorization.

189161588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860 (or 1858 counting only the distinct ones).

The product of its digits is 138240, while the sum is 47.

The square root of 189161588 is about 13753.6027280128. The cubic root of 189161588 is about 574.0428567757.

The spelling of 189161588 in words is "one hundred eighty-nine million, one hundred sixty-one thousand, five hundred eighty-eight".