189788634 has 48 divisors (see below), whose sum is σ = 485122560. Its totient is φ = 52475040.

The previous prime is 189788633. The next prime is 189788639. The reversal of 189788634 is 436887981.

It is not an unprimeable number, because it can be changed into a prime (189788633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20389 + ... + 28200.

It is an arithmetic number, because the mean of its divisors is an integer number (10106720).

Almost surely, 2^189788634 is an apocalyptic number.

189788634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

189788634 is an abundant number, since it is smaller than the sum of its proper divisors (295333926).

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

189788634 is a wasteful number, since it uses less digits than its factorization.

189788634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48635 (or 48632 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 189788634 is about 13776.3795679416. The cubic root of 189788634 is about 574.6764496055.

The spelling of 189788634 in words is "one hundred eighty-nine million, seven hundred eighty-eight thousand, six hundred thirty-four".