189421288 has 32 divisors (see below), whose sum is σ = 406368000. Its totient is φ = 81087552.

The previous prime is 189421273. The next prime is 189421289. The reversal of 189421288 is 882124981.

189421288 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (189421289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73038 + ... + 75586.

It is an arithmetic number, because the mean of its divisors is an integer number (12699000).

Almost surely, 2^189421288 is an apocalyptic number.

It is an amenable number.

189421288 is an abundant number, since it is smaller than the sum of its proper divisors (216946712).

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

189421288 is a wasteful number, since it uses less digits than its factorization.

189421288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3889 (or 3885 counting only the distinct ones).

The product of its digits is 73728, while the sum is 43.

The square root of 189421288 is about 13763.0406524140. The cubic root of 189421288 is about 574.3054378490.

The spelling of 189421288 in words is "one hundred eighty-nine million, four hundred twenty-one thousand, two hundred eighty-eight".