189438685 has 8 divisors (see below), whose sum is σ = 229451616. Its totient is φ = 150134160.

The previous prime is 189438659. The next prime is 189438713. The reversal of 189438685 is 586834981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189438685 - 2⁵ = 189438653 is a prime.

It is a Duffinian 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, 176511 + ... + 177580.

It is an arithmetic number, because the mean of its divisors is an integer number (28681452).

Almost surely, 2^189438685 is an apocalyptic number.

It is an amenable number.

189438685 is a deficient number, since it is larger than the sum of its proper divisors (40012931).

189438685 is a wasteful number, since it uses less digits than its factorization.

189438685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354203.

The product of its digits is 1658880, while the sum is 52.

The square root of 189438685 is about 13763.6726566713. The cubic root of 189438685 is about 574.3230192693.

The spelling of 189438685 in words is "one hundred eighty-nine million, four hundred thirty-eight thousand, six hundred eighty-five".