401844 has 12 divisors (see below), whose sum is σ = 937664. Its totient is φ = 133944.

The previous prime is 401839. The next prime is 401861. The reversal of 401844 is 448104.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×401844² = 322957200672, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 401844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16732 + ... + 16755.

2⁴⁰¹⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

401844 is an abundant number, since it is smaller than the sum of its proper divisors (535820).

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

401844 is a wasteful number, since it uses less digits than its factorization.

401844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33494 (or 33492 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 401844 is about 633.9116657706. The cubic root of 401844 is about 73.7936789998.

Adding to 401844 its reverse (448104), we get a palindrome (849948).

The spelling of 401844 in words is "four hundred one thousand, eight hundred forty-four".