189881424 has 60 divisors (see below), whose sum is σ = 537840576. Its totient is φ = 62527296.

The previous prime is 189881413. The next prime is 189881431. The reversal of 189881424 is 424188981.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 189881424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4009 + ... + 19895.

Almost surely, 2^189881424 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 189881424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268920288).

189881424 is an abundant number, since it is smaller than the sum of its proper divisors (347959152).

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

189881424 is a wasteful number, since it uses less digits than its factorization.

189881424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15984 (or 15975 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 189881424 is about 13779.7468772108. The cubic root of 189881424 is about 574.7700898106.

The spelling of 189881424 in words is "one hundred eighty-nine million, eight hundred eighty-one thousand, four hundred twenty-four".