40838665 has 32 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 26995200.

The previous prime is 40838663. The next prime is 40838669. The reversal of 40838665 is 56683804.

It is not a de Polignac number, because 40838665 - 2¹ = 40838663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40838663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213720 + ... + 213910.

It is an arithmetic number, because the mean of its divisors is an integer number (1814400).

Almost surely, 2^40838665 is an apocalyptic number.

It is an amenable number.

40838665 is a deficient number, since it is larger than the sum of its proper divisors (17222135).

40838665 is a wasteful number, since it uses less digits than its factorization.

40838665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 40838665 is about 6390.5136726244. The cubic root of 40838665 is about 344.3688383213.

The spelling of 40838665 in words is "forty million, eight hundred thirty-eight thousand, six hundred sixty-five".