401009908 has 18 divisors (see below), whose sum is σ = 756021686. Its totient is φ = 185014848.

The previous prime is 401009891. The next prime is 401009909. The reversal of 401009908 is 809900104.

It can be written as a sum of positive squares in 3 ways, for example, as 13235044 + 387774864 = 3638^2 + 19692^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 401009908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401009909) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 143016 + ... + 145792.

Almost surely, 2^401009908 is an apocalyptic number.

It is an amenable number.

401009908 is a deficient number, since it is larger than the sum of its proper divisors (355011778).

401009908 is an equidigital number, since it uses as much as digits as its factorization.

401009908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571 (or 2792 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 401009908 is about 20025.2317839270. The cubic root of 401009908 is about 737.4258674121.

The spelling of 401009908 in words is "four hundred one million, nine thousand, nine hundred eight".