40858109 has 4 divisors (see below), whose sum is σ = 40895616. Its totient is φ = 40820604.

The previous prime is 40858091. The next prime is 40858163. The reversal of 40858109 is 90185804.

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 40858109 - 2¹² = 40854013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40858199) 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, 17069 + ... + 19314.

It is an arithmetic number, because the mean of its divisors is an integer number (10223904).

Almost surely, 2^40858109 is an apocalyptic number.

It is an amenable number.

40858109 is a deficient number, since it is larger than the sum of its proper divisors (37507).

40858109 is a wasteful number, since it uses less digits than its factorization.

40858109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37506.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 40858109 is about 6392.0348090416. The cubic root of 40858109 is about 344.4234829846.

The spelling of 40858109 in words is "forty million, eight hundred fifty-eight thousand, one hundred nine".