845090 has 8 divisors (see below), whose sum is σ = 1521180. Its totient is φ = 338032.

The previous prime is 845083. The next prime is 845099. The reversal of 845090 is 90548.

It can be written as a sum of positive squares in 2 ways, for example, as 844561 + 529 = 919^2 + 23^2 .

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

It is not an unprimeable number, because it can be changed into a prime (845099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42245 + ... + 42264.

2⁸⁴⁵⁰⁹⁰ is an apocalyptic number.

845090 is a deficient number, since it is larger than the sum of its proper divisors (676090).

845090 is a wasteful number, since it uses less digits than its factorization.

845090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84516.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 845090 is about 919.2877677855. The cubic root of 845090 is about 94.5440758159.

The spelling of 845090 in words is "eight hundred forty-five thousand, ninety".