400010008 has 16 divisors (see below), whose sum is σ = 750293280. Its totient is φ = 199931808.

The previous prime is 400009999. The next prime is 400010057. The reversal of 400010008 is 800010004.

It is a self number, because there is not a number n which added to its sum of digits gives 400010008.

It is a congruent number.

It is an unprimeable number.

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, 19266 + ... + 34222.

It is an arithmetic number, because the mean of its divisors is an integer number (46893330).

Almost surely, 2^400010008 is an apocalyptic number.

It is an amenable number.

400010008 is a deficient number, since it is larger than the sum of its proper divisors (350283272).

400010008 is a wasteful number, since it uses less digits than its factorization.

400010008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18306 (or 18302 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 400010008 is about 20000.2501984350. The cubic root of 400010008 is about 736.8124446414.

The spelling of 400010008 in words is "four hundred million, ten thousand, eight".