189867432 has 16 divisors (see below), whose sum is σ = 474668640. Its totient is φ = 63289136.

The previous prime is 189867421. The next prime is 189867439. The reversal of 189867432 is 234768981.

It is not an unprimeable number, because it can be changed into a prime (189867439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3955548 + ... + 3955595.

It is an arithmetic number, because the mean of its divisors is an integer number (29666790).

Almost surely, 2^189867432 is an apocalyptic number.

189867432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189867432 is an abundant number, since it is smaller than the sum of its proper divisors (284801208).

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

189867432 is a wasteful number, since it uses less digits than its factorization.

189867432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7911152 (or 7911148 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 189867432 is about 13779.2391662239. The cubic root of 189867432 is about 574.7559715599.

The spelling of 189867432 in words is "one hundred eighty-nine million, eight hundred sixty-seven thousand, four hundred thirty-two".