401863 has 16 divisors (see below), whose sum is σ = 532224. Its totient is φ = 293760.

The previous prime is 401861. The next prime is 401867. The reversal of 401863 is 368104.

It is not a de Polignac number, because 401863 - 2¹ = 401861 is a prime.

It is a super-2 number, since 2×401863² = 322987741538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1156 + ... + 1462.

It is an arithmetic number, because the mean of its divisors is an integer number (33264).

2⁴⁰¹⁸⁶³ is an apocalyptic number.

401863 is a deficient number, since it is larger than the sum of its proper divisors (130361).

401863 is a wasteful number, since it uses less digits than its factorization.

401863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 401863 is about 633.9266519086. The cubic root of 401863 is about 73.7948420197.

Adding to 401863 its reverse (368104), we get a palindrome (769967).

The spelling of 401863 in words is "four hundred one thousand, eight hundred sixty-three".