40518117 has 16 divisors (see below), whose sum is σ = 60365760. Its totient is φ = 26859600.

The previous prime is 40518097. The next prime is 40518143. The reversal of 40518117 is 71181504.

It is not a de Polignac number, because 40518117 - 2⁶ = 40518053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40518187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 742 + ... + 9032.

It is an arithmetic number, because the mean of its divisors is an integer number (3772860).

Almost surely, 2^40518117 is an apocalyptic number.

It is an amenable number.

40518117 is a deficient number, since it is larger than the sum of its proper divisors (19847643).

40518117 is a wasteful number, since it uses less digits than its factorization.

40518117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8481 (or 8475 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 40518117 is about 6365.3842774808. The cubic root of 40518117 is about 343.4654720162.

The spelling of 40518117 in words is "forty million, five hundred eighteen thousand, one hundred seventeen".