40504165 has 16 divisors (see below), whose sum is σ = 52512768. Its totient is φ = 29814336.

The previous prime is 40504133. The next prime is 40504171. The reversal of 40504165 is 56140504.

It is a cyclic number.

It is not a de Polignac number, because 40504165 - 2⁵ = 40504133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24082 + ... + 25708.

It is an arithmetic number, because the mean of its divisors is an integer number (3282048).

Almost surely, 2^40504165 is an apocalyptic number.

It is an amenable number.

40504165 is a deficient number, since it is larger than the sum of its proper divisors (12008603).

40504165 is a wasteful number, since it uses less digits than its factorization.

40504165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 40504165 is about 6364.2882555711. The cubic root of 40504165 is about 343.4260445472.

Adding to 40504165 its reverse (56140504), we get a palindrome (96644669).

The spelling of 40504165 in words is "forty million, five hundred four thousand, one hundred sixty-five".