189645434 has 16 divisors (see below), whose sum is σ = 311692320. Its totient is φ = 85823760.

The previous prime is 189645433. The next prime is 189645451. The reversal of 189645434 is 434546981.

It is not an unprimeable number, because it can be changed into a prime (189645433) 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, 13784 + ... + 23859.

It is an arithmetic number, because the mean of its divisors is an integer number (19480770).

Almost surely, 2^189645434 is an apocalyptic number.

189645434 is a deficient number, since it is larger than the sum of its proper divisors (122046886).

189645434 is a wasteful number, since it uses less digits than its factorization.

189645434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37885.

The product of its digits is 414720, while the sum is 44.

The square root of 189645434 is about 13771.1812855688. The cubic root of 189645434 is about 574.5318775940.

The spelling of 189645434 in words is "one hundred eighty-nine million, six hundred forty-five thousand, four hundred thirty-four".