189879534 has 48 divisors (see below), whose sum is σ = 446361552. Its totient is φ = 57988224.

The previous prime is 189879517. The next prime is 189879539. The reversal of 189879534 is 435978981.

189879534 is a `hidden beast` number, since 18 + 98 + 7 + 9 + 534 = 666.

189879534 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189879539) 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, 29097 + ... + 35019.

It is an arithmetic number, because the mean of its divisors is an integer number (9299199).

Almost surely, 2^189879534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189879534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223180776).

189879534 is an abundant number, since it is smaller than the sum of its proper divisors (256482018).

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

189879534 is a wasteful number, since it uses less digits than its factorization.

189879534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6081 (or 6078 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 189879534 is about 13779.6782981316. The cubic root of 189879534 is about 574.7681827975.

The spelling of 189879534 in words is "one hundred eighty-nine million, eight hundred seventy-nine thousand, five hundred thirty-four".