401826 has 16 divisors (see below), whose sum is σ = 810144. Its totient is φ = 132864.

The previous prime is 401813. The next prime is 401827. The reversal of 401826 is 628104.

401826 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×401826² = 322928268552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401827) by changing a digit.

401826 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 985 + ... + 1331.

It is an arithmetic number, because the mean of its divisors is an integer number (50634).

2⁴⁰¹⁸²⁶ is an apocalyptic number.

401826 is an abundant number, since it is smaller than the sum of its proper divisors (408318).

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

401826 is a wasteful number, since it uses less digits than its factorization.

401826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 401826 is about 633.8974680498. The cubic root of 401826 is about 73.7925771575.

The spelling of 401826 in words is "four hundred one thousand, eight hundred twenty-six".