189381384 has 96 divisors (see below), whose sum is σ = 524160000. Its totient is φ = 61762176.

The previous prime is 189381383. The next prime is 189381391. The reversal of 189381384 is 483183981.

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

It is not an unprimeable number, because it can be changed into a prime (189381383) 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 23 ways as a sum of consecutive naturals, for example, 1270942 + ... + 1271090.

It is an arithmetic number, because the mean of its divisors is an integer number (5460000).

Almost surely, 2^189381384 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 189381384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262080000).

189381384 is an abundant number, since it is smaller than the sum of its proper divisors (334778616).

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

189381384 is a wasteful number, since it uses less digits than its factorization.

189381384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 420 counting only the distinct ones).

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

The square root of 189381384 is about 13761.5908964044. The cubic root of 189381384 is about 574.2651067720.

The spelling of 189381384 in words is "one hundred eighty-nine million, three hundred eighty-one thousand, three hundred eighty-four".