189819828 has 96 divisors (see below), whose sum is σ = 560286720. Its totient is φ = 55012320.

The previous prime is 189819797. The next prime is 189819853. The reversal of 189819828 is 828918981.

189819828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23851 + ... + 30797.

It is an arithmetic number, because the mean of its divisors is an integer number (5836320).

Almost surely, 2^189819828 is an apocalyptic number.

189819828 is a gapful number since it is divisible by the number (18) 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 189819828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280143360).

189819828 is an abundant number, since it is smaller than the sum of its proper divisors (370466892).

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

189819828 is a wasteful number, since it uses less digits than its factorization.

189819828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6994 (or 6986 counting only the distinct ones).

The product of its digits is 663552, while the sum is 54.

The square root of 189819828 is about 13777.5116766418. The cubic root of 189819828 is about 574.7079328311.

The spelling of 189819828 in words is "one hundred eighty-nine million, eight hundred nineteen thousand, eight hundred twenty-eight".