189697388 has 18 divisors (see below), whose sum is σ = 338372244. Its totient is φ = 93053584.

The previous prime is 189697367. The next prime is 189697393. The reversal of 189697388 is 883796981.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2795 + ... + 19677.

It is an arithmetic number, because the mean of its divisors is an integer number (18798458).

Almost surely, 2^189697388 is an apocalyptic number.

It is an amenable number.

189697388 is a deficient number, since it is larger than the sum of its proper divisors (148674856).

189697388 is a wasteful number, since it uses less digits than its factorization.

189697388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16993 (or 16938 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 59.

The square root of 189697388 is about 13773.0674869471. The cubic root of 189697388 is about 574.5843377793.

The spelling of 189697388 in words is "one hundred eighty-nine million, six hundred ninety-seven thousand, three hundred eighty-eight".