401395806 has 48 divisors (see below), whose sum is σ = 1052404704. Its totient is φ = 107937792.

The previous prime is 401395801. The next prime is 401395837. The reversal of 401395806 is 608593104.

401395806 is a `hidden beast` number, since 40 + 1 + 39 + 580 + 6 = 666.

It is a super-2 number, since 2×401395806² = 322237186148779272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401395801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91555 + ... + 95838.

It is an arithmetic number, because the mean of its divisors is an integer number (21925098).

Almost surely, 2^401395806 is an apocalyptic number.

401395806 is an abundant number, since it is smaller than the sum of its proper divisors (651008898).

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

401395806 is a wasteful number, since it uses less digits than its factorization.

401395806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187425 (or 187422 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 401395806 is about 20034.8647612106. The cubic root of 401395806 is about 737.6623369922.

The spelling of 401395806 in words is "four hundred one million, three hundred ninety-five thousand, eight hundred six".