890945 has 16 divisors (see below), whose sum is σ = 1185408. Its totient is φ = 637440.

The previous prime is 890941. The next prime is 890957. The reversal of 890945 is 549098.

It is not a de Polignac number, because 890945 - 2² = 890941 is a prime.

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

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (890941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5252 + ... + 5418.

It is an arithmetic number, because the mean of its divisors is an integer number (74088).

2⁸⁹⁰⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

890945 is a deficient number, since it is larger than the sum of its proper divisors (294463).

890945 is a wasteful number, since it uses less digits than its factorization.

890945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 890945 is about 943.8988293244. The cubic root of 890945 is about 96.2240498997.

The spelling of 890945 in words is "eight hundred ninety thousand, nine hundred forty-five".