401440008 has 16 divisors (see below), whose sum is σ = 1003600080. Its totient is φ = 133813328.

The previous prime is 401440007. The next prime is 401440009. The reversal of 401440008 is 800044104.

It is an interprime number because it is at equal distance from previous prime (401440007) and next prime (401440009).

It is a super-2 number, since 2×401440008² = 322308160046080128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401440007) 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 3 ways as a sum of consecutive naturals, for example, 8363310 + ... + 8363357.

It is an arithmetic number, because the mean of its divisors is an integer number (62725005).

Almost surely, 2^401440008 is an apocalyptic number.

It is an amenable number.

401440008 is an abundant number, since it is smaller than the sum of its proper divisors (602160072).

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

401440008 is a wasteful number, since it uses less digits than its factorization.

401440008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16726676 (or 16726672 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 401440008 is about 20035.9678578301. The cubic root of 401440008 is about 737.6894133039.

The spelling of 401440008 in words is "four hundred one million, four hundred forty thousand, eight".