401018805 has 72 divisors (see below), whose sum is σ = 780788736. Its totient is φ = 190175040.

The previous prime is 401018771. The next prime is 401018833. The reversal of 401018805 is 508810104.

It is not a de Polignac number, because 401018805 - 2⁶ = 401018741 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 255132 + ... + 256698.

It is an arithmetic number, because the mean of its divisors is an integer number (10844288).

Almost surely, 2^401018805 is an apocalyptic number.

401018805 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

401018805 is a deficient number, since it is larger than the sum of its proper divisors (379769931).

401018805 is a wasteful number, since it uses less digits than its factorization.

401018805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 401018805 is about 20025.4539274394. The cubic root of 401018805 is about 737.4313210009.

Adding to 401018805 its reverse (508810104), we get a palindrome (909828909).

The spelling of 401018805 in words is "four hundred one million, eighteen thousand, eight hundred five".