890045 has 8 divisors (see below), whose sum is σ = 1150296. Its totient is φ = 657216.

The previous prime is 890027. The next prime is 890053. The reversal of 890045 is 540098.

It can be written as a sum of positive squares in 4 ways, for example, as 206116 + 683929 = 454^2 + 827^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 890045 - 2¹⁸ = 627901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 889996 and 890023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6782 + ... + 6911.

It is an arithmetic number, because the mean of its divisors is an integer number (143787).

2⁸⁹⁰⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

890045 is a deficient number, since it is larger than the sum of its proper divisors (260251).

890045 is a wasteful number, since it uses less digits than its factorization.

890045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13711.

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

The square root of 890045 is about 943.4219628565. The cubic root of 890045 is about 96.1916383135.

The spelling of 890045 in words is "eight hundred ninety thousand, forty-five".