189420984 has 128 divisors (see below), whose sum is σ = 548251200. Its totient is φ = 60549120.

The previous prime is 189420949. The next prime is 189420989. The reversal of 189420984 is 489024981.

189420984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189420989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 646342 + ... + 646634.

Almost surely, 2^189420984 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 189420984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274125600).

189420984 is an abundant number, since it is smaller than the sum of its proper divisors (358830216).

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

189420984 is a wasteful number, since it uses less digits than its factorization.

189420984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 189420984 is about 13763.0296083384. The cubic root of 189420984 is about 574.3051306168.

The spelling of 189420984 in words is "one hundred eighty-nine million, four hundred twenty thousand, nine hundred eighty-four".