890401 has 4 divisors (see below), whose sum is σ = 911152. Its totient is φ = 869652.

The previous prime is 890377. The next prime is 890419. The reversal of 890401 is 104098.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 890401 - 2¹⁷ = 759329 is a prime.

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 (890441) 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, 10311 + ... + 10396.

It is an arithmetic number, because the mean of its divisors is an integer number (227788).

2⁸⁹⁰⁴⁰¹ is an apocalyptic number.

It is an amenable number.

890401 is a deficient number, since it is larger than the sum of its proper divisors (20751).

890401 is a wasteful number, since it uses less digits than its factorization.

890401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20750.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 890401 is about 943.6106188466. The cubic root of 890401 is about 96.2044615073.

Adding to 890401 its reverse (104098), we get a palindrome (994499).

It can be divided in two parts, 8 and 90401, that added together give a palindrome (90409).

The spelling of 890401 in words is "eight hundred ninety thousand, four hundred one".