402040017 has 20 divisors (see below), whose sum is σ = 601157040. Its totient is φ = 267768504.

The previous prime is 402040013. The next prime is 402040043. The reversal of 402040017 is 710040204.

It is a happy number.

It is not a de Polignac number, because 402040017 - 2² = 402040013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402040013) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 121734 + ... + 124992.

It is an arithmetic number, because the mean of its divisors is an integer number (30057852).

Almost surely, 2^402040017 is an apocalyptic number.

It is an amenable number.

402040017 is a deficient number, since it is larger than the sum of its proper divisors (199117023).

402040017 is a wasteful number, since it uses less digits than its factorization.

402040017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4794 (or 4785 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 402040017 is about 20050.9355642075. The cubic root of 402040017 is about 738.0567574829.

The spelling of 402040017 in words is "four hundred two million, forty thousand, seventeen".