40217859 has 18 divisors (see below), whose sum is σ = 63855428. Its totient is φ = 24373800.

The previous prime is 40217833. The next prime is 40217909. The reversal of 40217859 is 95871204.

It is not a de Polignac number, because 40217859 - 2⁸ = 40217603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40217059) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17377 + ... + 19554.

Almost surely, 2^40217859 is an apocalyptic number.

40217859 is a deficient number, since it is larger than the sum of its proper divisors (23637569).

40217859 is a wasteful number, since it uses less digits than its factorization.

40217859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36959 (or 36945 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 40217859 is about 6341.7551986812. The cubic root of 40217859 is about 342.6149549305.

The spelling of 40217859 in words is "forty million, two hundred seventeen thousand, eight hundred fifty-nine".