40158817 has 4 divisors (see below), whose sum is σ = 40271040. Its totient is φ = 40046596.

The previous prime is 40158793. The next prime is 40158827. The reversal of 40158817 is 71885104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40158817 - 2¹⁵ = 40126049 is a prime.

It is a super-2 number, since 2×40158817² = 3225461165678978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40158827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55573 + ... + 56290.

It is an arithmetic number, because the mean of its divisors is an integer number (10067760).

Almost surely, 2^40158817 is an apocalyptic number.

It is an amenable number.

40158817 is a deficient number, since it is larger than the sum of its proper divisors (112223).

40158817 is a wasteful number, since it uses less digits than its factorization.

40158817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112222.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 40158817 is about 6337.0984685422. The cubic root of 40158817 is about 342.4472137024.

The spelling of 40158817 in words is "forty million, one hundred fifty-eight thousand, eight hundred seventeen".