40028008 has 16 divisors (see below), whose sum is σ = 75185280. Its totient is φ = 19978608.

The previous prime is 40027997. The next prime is 40028029. The reversal of 40028008 is 80082004.

It is a self number, because there is not a number n which added to its sum of digits gives 40028008.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735 + ... + 8977.

It is an arithmetic number, because the mean of its divisors is an integer number (4699080).

Almost surely, 2^40028008 is an apocalyptic number.

It is an amenable number.

40028008 is a deficient number, since it is larger than the sum of its proper divisors (35157272).

40028008 is a wasteful number, since it uses less digits than its factorization.

40028008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8856 (or 8852 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 40028008 is about 6326.7691596896. The cubic root of 40028008 is about 342.0749923894.

The spelling of 40028008 in words is "forty million, twenty-eight thousand, eight".