189563646 has 16 divisors (see below), whose sum is σ = 399081600. Its totient is φ = 59862168.

The previous prime is 189563641. The next prime is 189563657. The reversal of 189563646 is 646365981.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 189563595 and 189563604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189563641) 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, 831306 + ... + 831533.

It is an arithmetic number, because the mean of its divisors is an integer number (24942600).

Almost surely, 2^189563646 is an apocalyptic number.

189563646 is an abundant number, since it is smaller than the sum of its proper divisors (209517954).

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

189563646 is a wasteful number, since it uses less digits than its factorization.

189563646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662863.

The product of its digits is 933120, while the sum is 48.

The square root of 189563646 is about 13768.2114306834. The cubic root of 189563646 is about 574.4492733205.

The spelling of 189563646 in words is "one hundred eighty-nine million, five hundred sixty-three thousand, six hundred forty-six".