189221892 has 24 divisors (see below), whose sum is σ = 455761152. Its totient is φ = 61039200.

The previous prime is 189221831. The next prime is 189221899. The reversal of 189221892 is 298122981.

It is not an unprimeable number, because it can be changed into a prime (189221899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253959 + ... + 254702.

It is an arithmetic number, because the mean of its divisors is an integer number (18990048).

Almost surely, 2^189221892 is an apocalyptic number.

189221892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189221892 is an abundant number, since it is smaller than the sum of its proper divisors (266539260).

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

189221892 is a wasteful number, since it uses less digits than its factorization.

189221892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508699 (or 508697 counting only the distinct ones).

The product of its digits is 41472, while the sum is 42.

The square root of 189221892 is about 13755.7948516253. The cubic root of 189221892 is about 574.1038511930.

The spelling of 189221892 in words is "one hundred eighty-nine million, two hundred twenty-one thousand, eight hundred ninety-two".