890455 has 4 divisors (see below), whose sum is σ = 1068552. Its totient is φ = 712360.

The previous prime is 890441. The next prime is 890459. The reversal of 890455 is 554098.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 890455 - 2¹³ = 882263 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890459) 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, 89041 + ... + 89050.

It is an arithmetic number, because the mean of its divisors is an integer number (267138).

2⁸⁹⁰⁴⁵⁵ is an apocalyptic number.

890455 is a deficient number, since it is larger than the sum of its proper divisors (178097).

890455 is a wasteful number, since it uses less digits than its factorization.

890455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178096.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 890455 is about 943.6392319102. The cubic root of 890455 is about 96.2064062999.

The spelling of 890455 in words is "eight hundred ninety thousand, four hundred fifty-five".