190445 has 8 divisors (see below), whose sum is σ = 234360. Its totient is φ = 148480.

The previous prime is 190409. The next prime is 190471. The reversal of 190445 is 544091.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14884 + 175561 = 122^2 + 419^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 190445 - 2¹⁰ = 189421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 190445.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 260 + ... + 669.

It is an arithmetic number, because the mean of its divisors is an integer number (29295).

2¹⁹⁰⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

190445 is a deficient number, since it is larger than the sum of its proper divisors (43915).

190445 is an equidigital number, since it uses as much as digits as its factorization.

190445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 190445 is about 436.4000458295. The cubic root of 190445 is about 57.5338175361.

The spelling of 190445 in words is "one hundred ninety thousand, four hundred forty-five".