189806816 has 24 divisors (see below), whose sum is σ = 382375224. Its totient is φ = 92695680.

The previous prime is 189806809. The next prime is 189806839. The reversal of 189806816 is 618608981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67595 + ... + 70346.

It is an arithmetic number, because the mean of its divisors is an integer number (15932301).

Almost surely, 2^189806816 is an apocalyptic number.

189806816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

189806816 is an abundant number, since it is smaller than the sum of its proper divisors (192568408).

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

189806816 is a wasteful number, since it uses less digits than its factorization.

189806816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137994 (or 137986 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 189806816 is about 13777.0394497512. The cubic root of 189806816 is about 574.6948006053.

The spelling of 189806816 in words is "one hundred eighty-nine million, eight hundred six thousand, eight hundred sixteen".