40010008 has 8 divisors (see below), whose sum is σ = 75018780. Its totient is φ = 20005000.

The previous prime is 40009999. The next prime is 40010011. The reversal of 40010008 is 80001004.

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

It is a self number, because there is not a number n which added to its sum of digits gives 40010008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500618 + ... + 2500633.

Almost surely, 2^40010008 is an apocalyptic number.

It is an amenable number.

40010008 is a deficient number, since it is larger than the sum of its proper divisors (35008772).

40010008 is a wasteful number, since it uses less digits than its factorization.

40010008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5001257 (or 5001253 counting only the distinct ones).

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

The square root of 40010008 is about 6325.3464727238. The cubic root of 40010008 is about 342.0237093557.

The spelling of 40010008 in words is "forty million, ten thousand, eight".