40865385 has 32 divisors (see below), whose sum is σ = 72690048. Its totient is φ = 19435520.

The previous prime is 40865369. The next prime is 40865387. The reversal of 40865385 is 58356804.

It is a happy number.

It is not a de Polignac number, because 40865385 - 2⁴ = 40865369 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40865387) 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, 6409 + ... + 11081.

It is an arithmetic number, because the mean of its divisors is an integer number (2271564).

Almost surely, 2^40865385 is an apocalyptic number.

It is an amenable number.

40865385 is a deficient number, since it is larger than the sum of its proper divisors (31824663).

40865385 is a wasteful number, since it uses less digits than its factorization.

40865385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 40865385 is about 6392.6039295423. The cubic root of 40865385 is about 344.4439267152.

The spelling of 40865385 in words is "forty million, eight hundred sixty-five thousand, three hundred eighty-five".