190664 has 8 divisors (see below), whose sum is σ = 357510. Its totient is φ = 95328.

The previous prime is 190657. The next prime is 190667. The reversal of 190664 is 466091.

190664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 128164 + 62500 = 358^2 + 250^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (190667) by changing a digit.

190664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11909 + ... + 11924.

2¹⁹⁰⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

190664 is a deficient number, since it is larger than the sum of its proper divisors (166846).

190664 is a wasteful number, since it uses less digits than its factorization.

190664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23839 (or 23835 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 190664 is about 436.6508903002. The cubic root of 190664 is about 57.5558625349. Note that the first 3 decimals are identical.

The spelling of 190664 in words is "one hundred ninety thousand, six hundred sixty-four".