189663768 has 80 divisors (see below), whose sum is σ = 607139280. Its totient is φ = 54188352.

The previous prime is 189663763. The next prime is 189663779. The reversal of 189663768 is 867366981.

It is a happy number.

189663768 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189663763) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 16371 + ... + 25442.

It is an arithmetic number, because the mean of its divisors is an integer number (7589241).

Almost surely, 2^189663768 is an apocalyptic number.

189663768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

189663768 is an abundant number, since it is smaller than the sum of its proper divisors (417475512).

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

189663768 is a wasteful number, since it uses less digits than its factorization.

189663768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41838 (or 41825 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 189663768 is about 13771.8469349612. The cubic root of 189663768 is about 574.5503913151.

The spelling of 189663768 in words is "one hundred eighty-nine million, six hundred sixty-three thousand, seven hundred sixty-eight".