40081585 has 8 divisors (see below), whose sum is σ = 48340800. Its totient is φ = 31903344.

The previous prime is 40081513. The next prime is 40081607. The reversal of 40081585 is 58518004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40081585 - 2¹³ = 40073393 is a prime.

It is a super-2 number, since 2×40081585² = 3213066912224450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19147 + ... + 21136.

It is an arithmetic number, because the mean of its divisors is an integer number (6042600).

Almost surely, 2^40081585 is an apocalyptic number.

It is an amenable number.

40081585 is a deficient number, since it is larger than the sum of its proper divisors (8259215).

40081585 is a wasteful number, since it uses less digits than its factorization.

40081585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40487.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 40081585 is about 6331.0018954349. The cubic root of 40081585 is about 342.2275454131.

Adding to 40081585 its reverse (58518004), we get a palindrome (98599589).

The spelling of 40081585 in words is "forty million, eighty-one thousand, five hundred eighty-five".