401406 has 16 divisors (see below), whose sum is σ = 810000. Its totient is φ = 132608.

The previous prime is 401393. The next prime is 401407. The reversal of 401406 is 604104.

It is a super-2 number, since 2×401406² = 322253553672, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 401406.

It is not an unprimeable number, because it can be changed into a prime (401407) by changing a digit.

401406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670 + ... + 1118.

It is an arithmetic number, because the mean of its divisors is an integer number (50625).

2⁴⁰¹⁴⁰⁶ is an apocalyptic number.

401406 is an abundant number, since it is smaller than the sum of its proper divisors (408594).

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

401406 is a wasteful number, since it uses less digits than its factorization.

401406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 401406 is about 633.5660975778. The cubic root of 401406 is about 73.7668581590.

The spelling of 401406 in words is "four hundred one thousand, four hundred six".