890505 has 48 divisors (see below), whose sum is σ = 1931904. Its totient is φ = 368640.

The previous prime is 890501. The next prime is 890531. The reversal of 890505 is 505098.

890505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 890505 - 2² = 890501 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (890501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3337 + ... + 3593.

It is an arithmetic number, because the mean of its divisors is an integer number (40248).

2⁸⁹⁰⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

890505 is an abundant number, since it is smaller than the sum of its proper divisors (1041399).

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

890505 is a wasteful number, since it uses less digits than its factorization.

890505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 890505 is about 943.6657247140. The cubic root of 890505 is about 96.2082069638.

The spelling of 890505 in words is "eight hundred ninety thousand, five hundred five".