189708356 has 24 divisors (see below), whose sum is σ = 344136576. Its totient is φ = 91444320.

The previous prime is 189708349. The next prime is 189708371. The reversal of 189708356 is 653807981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 189708356.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5066 + ... + 20126.

It is an arithmetic number, because the mean of its divisors is an integer number (14339024).

Almost surely, 2^189708356 is an apocalyptic number.

It is an amenable number.

189708356 is a deficient number, since it is larger than the sum of its proper divisors (154428220).

189708356 is a wasteful number, since it uses less digits than its factorization.

189708356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15179 (or 15177 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 189708356 is about 13773.4656495742. The cubic root of 189708356 is about 574.5954114154.

The spelling of 189708356 in words is "one hundred eighty-nine million, seven hundred eight thousand, three hundred fifty-six".