400400448008 has 32 divisors (see below), whose sum is σ = 819152364960. Its totient is φ = 181966548480.

The previous prime is 400400447947. The next prime is 400400448011. The reversal of 400400448008 is 800844004004.

It is a happy number.

It is a super-2 number, since 2×400400448008² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61016 + ... + 896952.

It is an arithmetic number, because the mean of its divisors is an integer number (25598511405).

Almost surely, 2^400400448008 is an apocalyptic number.

It is an amenable number.

400400448008 is an abundant number, since it is smaller than the sum of its proper divisors (418751916952).

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

400400448008 is a wasteful number, since it uses less digits than its factorization.

400400448008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841397 (or 841393 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The spelling of 400400448008 in words is "four hundred billion, four hundred million, four hundred forty-eight thousand, eight".