40684865 has 32 divisors (see below), whose sum is σ = 55329792. Its totient is φ = 28512000.

The previous prime is 40684849. The next prime is 40684873. The reversal of 40684865 is 56848604.

It is not a de Polignac number, because 40684865 - 2⁴ = 40684849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122750 + ... + 123080.

It is an arithmetic number, because the mean of its divisors is an integer number (1729056).

Almost surely, 2^40684865 is an apocalyptic number.

It is an amenable number.

40684865 is a deficient number, since it is larger than the sum of its proper divisors (14644927).

40684865 is a wasteful number, since it uses less digits than its factorization.

40684865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 40684865 is about 6378.4688601576. The cubic root of 40684865 is about 343.9359923500.

The spelling of 40684865 in words is "forty million, six hundred eighty-four thousand, eight hundred sixty-five".