194490 has 24 divisors (see below), whose sum is σ = 505908. Its totient is φ = 51840.

The previous prime is 194483. The next prime is 194507. The reversal of 194490 is 94491.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 9 = 441^2 + 3^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 991 + ... + 1170.

194490 is a Friedman number, since it can be written as (40-19)^4+9, using all its digits and the basic arithmetic operations.

2¹⁹⁴⁴⁹⁰ is an apocalyptic number.

194490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194490 is an abundant number, since it is smaller than the sum of its proper divisors (311418).

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

194490 is a wasteful number, since it uses less digits than its factorization.

194490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174 (or 2171 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 194490 is about 441.0102039636. The cubic root of 194490 is about 57.9383014136.

Subtracting from 194490 its reverse (94491), we obtain a palindrome (99999).

The spelling of 194490 in words is "one hundred ninety-four thousand, four hundred ninety".