401838 has 8 divisors (see below), whose sum is σ = 803688. Its totient is φ = 133944.

The previous prime is 401827. The next prime is 401839. The reversal of 401838 is 838104.

It is a sphenic number, since it is the product of 3 distinct primes.

401838 is an admirable number.

It is a super-2 number, since 2×401838² = 322947556488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401839) 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, 33481 + ... + 33492.

It is an arithmetic number, because the mean of its divisors is an integer number (100461).

2⁴⁰¹⁸³⁸ is an apocalyptic number.

401838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

401838 is a wasteful number, since it uses less digits than its factorization.

401838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66978.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 401838 is about 633.9069332323. The cubic root of 401838 is about 73.7933117227.

The spelling of 401838 in words is "four hundred one thousand, eight hundred thirty-eight".