40428008 has 8 divisors (see below), whose sum is σ = 75802530. Its totient is φ = 20214000.

The previous prime is 40427993. The next prime is 40428071. The reversal of 40428008 is 80082404.

It can be written as a sum of positive squares in only one way, i.e., 40424164 + 3844 = 6358^2 + 62^2 .

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, 2526743 + ... + 2526758.

Almost surely, 2^40428008 is an apocalyptic number.

It is an amenable number.

40428008 is a deficient number, since it is larger than the sum of its proper divisors (35374522).

40428008 is a wasteful number, since it uses less digits than its factorization.

40428008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053507 (or 5053503 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 40428008 is about 6358.3022891335. The cubic root of 40428008 is about 343.2106699356.

The spelling of 40428008 in words is "forty million, four hundred twenty-eight thousand, eight".