189108642 has 16 divisors (see below), whose sum is σ = 383545152. Its totient is φ = 62148240.

The previous prime is 189108637. The next prime is 189108659. The reversal of 189108642 is 246801981.

It is a self number, because there is not a number n which added to its sum of digits gives 189108642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221533 + ... + 222384.

It is an arithmetic number, because the mean of its divisors is an integer number (23971572).

Almost surely, 2^189108642 is an apocalyptic number.

189108642 is an abundant number, since it is smaller than the sum of its proper divisors (194436510).

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

189108642 is a wasteful number, since it uses less digits than its factorization.

189108642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443993.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 189108642 is about 13751.6777885464. The cubic root of 189108642 is about 573.9892939118.

The spelling of 189108642 in words is "one hundred eighty-nine million, one hundred eight thousand, six hundred forty-two".