189966764 has 24 divisors (see below), whose sum is σ = 359573760. Its totient is φ = 87295104.

The previous prime is 189966761. The next prime is 189966811. The reversal of 189966764 is 467669981.

189966764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (189966761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4277 + ... + 19955.

It is an arithmetic number, because the mean of its divisors is an integer number (14982240).

Almost surely, 2^189966764 is an apocalyptic number.

It is an amenable number.

189966764 is a deficient number, since it is larger than the sum of its proper divisors (169606996).

189966764 is a wasteful number, since it uses less digits than its factorization.

189966764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15929 (or 15927 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 56.

The square root of 189966764 is about 13782.8431029305. The cubic root of 189966764 is about 574.8561848269.

The spelling of 189966764 in words is "one hundred eighty-nine million, nine hundred sixty-six thousand, seven hundred sixty-four".