190305664 has 32 divisors (see below), whose sum is σ = 380602800. Its totient is φ = 94781952.

The previous prime is 190305649. The next prime is 190305721. The reversal of 190305664 is 466503091.

190305664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31669 + ... + 37195.

Almost surely, 2^190305664 is an apocalyptic number.

It is an amenable number.

190305664 is a deficient number, since it is larger than the sum of its proper divisors (190297136).

190305664 is an equidigital number, since it uses as much as digits as its factorization.

190305664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5810 (or 5798 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 190305664 is about 13795.1318949838. The cubic root of 190305664 is about 575.1978288416.

It can be divided in two parts, 190305 and 664, that added together give a square (190969 = 437²).

The spelling of 190305664 in words is "one hundred ninety million, three hundred five thousand, six hundred sixty-four".