40817859 has 4 divisors (see below), whose sum is σ = 54423816. Its totient is φ = 27211904.

The previous prime is 40817857. The next prime is 40817873. The reversal of 40817859 is 95871804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40817859 - 2¹ = 40817857 is a prime.

It is a super-2 number, since 2×40817859² = 3332195226687762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40817859.

It is not an unprimeable number, because it can be changed into a prime (40817851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6802974 + ... + 6802979.

It is an arithmetic number, because the mean of its divisors is an integer number (13605954).

Almost surely, 2^40817859 is an apocalyptic number.

40817859 is a deficient number, since it is larger than the sum of its proper divisors (13605957).

40817859 is a wasteful number, since it uses less digits than its factorization.

40817859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13605956.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 40817859 is about 6388.8855835740. The cubic root of 40817859 is about 344.3103467328.

The spelling of 40817859 in words is "forty million, eight hundred seventeen thousand, eight hundred fifty-nine".