401766 has 16 divisors (see below), whose sum is σ = 831600. Its totient is φ = 129248.

The previous prime is 401743. The next prime is 401771. The reversal of 401766 is 667104.

It is a super-2 number, since 2×401766² = 322831837512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 981 + ... + 1328.

It is an arithmetic number, because the mean of its divisors is an integer number (51975).

2⁴⁰¹⁷⁶⁶ is an apocalyptic number.

401766 is an abundant number, since it is smaller than the sum of its proper divisors (429834).

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

401766 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 12 representation: 401766 = (174606)₁₂.

401766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 401766 is about 633.8501400173. The cubic root of 401766 is about 73.7889041125.

The spelling of 401766 in words is "four hundred one thousand, seven hundred sixty-six".