189688308 has 24 divisors (see below), whose sum is σ = 452900448. Its totient is φ = 61758816.

The previous prime is 189688271. The next prime is 189688319. The reversal of 189688308 is 803886981.

It is a happy number.

It is a congruent number.

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, 183291 + ... + 184322.

It is an arithmetic number, because the mean of its divisors is an integer number (18870852).

Almost surely, 2^189688308 is an apocalyptic number.

It is an amenable number.

189688308 is an abundant number, since it is smaller than the sum of its proper divisors (263212140).

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

189688308 is a wasteful number, since it uses less digits than its factorization.

189688308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367663 (or 367661 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 189688308 is about 13772.7378541814. The cubic root of 189688308 is about 574.5751700041.

The spelling of 189688308 in words is "one hundred eighty-nine million, six hundred eighty-eight thousand, three hundred eight".