190864 has 20 divisors (see below), whose sum is σ = 376960. Its totient is φ = 93600.

The previous prime is 190843. The next prime is 190871. The reversal of 190864 is 468091.

It is an unprimeable number.

190864 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 in 3 ways as a sum of consecutive naturals, for example, 1189 + ... + 1339.

It is an arithmetic number, because the mean of its divisors is an integer number (18848).

2¹⁹⁰⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

190864 is a deficient number, since it is larger than the sum of its proper divisors (186096).

190864 is a wasteful number, since it uses less digits than its factorization.

190864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 190864 is about 436.8798461820. The cubic root of 190864 is about 57.5759802112.

The spelling of 190864 in words is "one hundred ninety thousand, eight hundred sixty-four".