845490 has 16 divisors (see below), whose sum is σ = 2029248. Its totient is φ = 225456.

The previous prime is 845489. The next prime is 845491. The reversal of 845490 is 94548.

It is an interprime number because it is at equal distance from previous prime (845489) and next prime (845491).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 28183 = 845490 / (8 + 4 + 5 + 4 + 9 + 0).

It is not an unprimeable number, because it can be changed into a prime (845491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14062 + ... + 14121.

It is an arithmetic number, because the mean of its divisors is an integer number (126828).

2⁸⁴⁵⁴⁹⁰ is an apocalyptic number.

845490 is an abundant number, since it is smaller than the sum of its proper divisors (1183758).

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

845490 is a wasteful number, since it uses less digits than its factorization.

845490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28193.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 845490 is about 919.5053017792. The cubic root of 845490 is about 94.5589900717.

The spelling of 845490 in words is "eight hundred forty-five thousand, four hundred ninety".