189387708 has 12 divisors (see below), whose sum is σ = 441904680. Its totient is φ = 63129232.

The previous prime is 189387707. The next prime is 189387713. The reversal of 189387708 is 807783981.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189387707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7891143 + ... + 7891166.

It is an arithmetic number, because the mean of its divisors is an integer number (36825390).

Almost surely, 2^189387708 is an apocalyptic number.

It is an amenable number.

189387708 is an abundant number, since it is smaller than the sum of its proper divisors (252516972).

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

189387708 is a wasteful number, since it uses less digits than its factorization.

189387708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15782316 (or 15782314 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 51.

The square root of 189387708 is about 13761.8206644325. The cubic root of 189387708 is about 574.2714988331.

The spelling of 189387708 in words is "one hundred eighty-nine million, three hundred eighty-seven thousand, seven hundred eight".