189218634 has 32 divisors (see below), whose sum is σ = 413752320. Its totient is φ = 57212400.

The previous prime is 189218633. The next prime is 189218641. The reversal of 189218634 is 436812981.

It is not an unprimeable number, because it can be changed into a prime (189218633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29487 + ... + 35325.

It is an arithmetic number, because the mean of its divisors is an integer number (12929760).

Almost surely, 2^189218634 is an apocalyptic number.

189218634 is an abundant number, since it is smaller than the sum of its proper divisors (224533686).

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

189218634 is a wasteful number, since it uses less digits than its factorization.

189218634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6346.

The product of its digits is 82944, while the sum is 42.

The square root of 189218634 is about 13755.6764282968. The cubic root of 189218634 is about 574.1005562235.

The spelling of 189218634 in words is "one hundred eighty-nine million, two hundred eighteen thousand, six hundred thirty-four".