189424818 has 128 divisors (see below), whose sum is σ = 483655680. Its totient is φ = 55112400.

The previous prime is 189424811. The next prime is 189424843. The reversal of 189424818 is 818424981.

Its product of digits (147456) is a multiple of the sum of its prime factors (192).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189424811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1491471 + ... + 1491597.

It is an arithmetic number, because the mean of its divisors is an integer number (3778560).

Almost surely, 2^189424818 is an apocalyptic number.

189424818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189424818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241827840).

189424818 is an abundant number, since it is smaller than the sum of its proper divisors (294230862).

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

189424818 is a wasteful number, since it uses less digits than its factorization.

189424818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 174 counting only the distinct ones).

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

The square root of 189424818 is about 13763.1688938267. The cubic root of 189424818 is about 574.3090053565.

The spelling of 189424818 in words is "one hundred eighty-nine million, four hundred twenty-four thousand, eight hundred eighteen".