800040008 has 8 divisors (see below), whose sum is σ = 1500075030. Its totient is φ = 400020000.

The previous prime is 800039993. The next prime is 800040019.

800040008 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 425927044 + 374112964 = 20638^2 + 19342^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50002493 + ... + 50002508.

Almost surely, 2^800040008 is an apocalyptic number.

It is an amenable number.

800040008 is a deficient number, since it is larger than the sum of its proper divisors (700035022).

800040008 is a wasteful number, since it uses less digits than its factorization.

800040008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100005007 (or 100005003 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 800040008 is about 28284.9784868223. The cubic root of 800040008 is about 928.3332415218. Note that the first 3 decimals are identical.

The spelling of 800040008 in words is "eight hundred million, forty thousand, eight".