400008068 has 6 divisors (see below), whose sum is σ = 700014126. Its totient is φ = 200004032.

The previous prime is 400008043. The next prime is 400008101. The reversal of 400008068 is 860800004.

It can be written as a sum of positive squares in only one way, i.e., 353740864 + 46267204 = 18808^2 + 6802^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50001005 + ... + 50001012.

It is an arithmetic number, because the mean of its divisors is an integer number (116669021).

Almost surely, 2^400008068 is an apocalyptic number.

It is an amenable number.

400008068 is a deficient number, since it is larger than the sum of its proper divisors (300006058).

400008068 is a wasteful number, since it uses less digits than its factorization.

400008068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100002021 (or 100002019 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 400008068 is about 20000.2016989829. The cubic root of 400008068 is about 736.8112534891.

The spelling of 400008068 in words is "four hundred million, eight thousand, sixty-eight".