40064865 has 16 divisors (see below), whose sum is σ = 66172416. Its totient is φ = 20678400.

The previous prime is 40064839. The next prime is 40064867. The reversal of 40064865 is 56846004.

It is a happy number.

40064865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40064865 - 2⁵ = 40064833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40064867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42616 + ... + 43545.

It is an arithmetic number, because the mean of its divisors is an integer number (4135776).

Almost surely, 2^40064865 is an apocalyptic number.

It is an amenable number.

40064865 is a deficient number, since it is larger than the sum of its proper divisors (26107551).

40064865 is a wasteful number, since it uses less digits than its factorization.

40064865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86200.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 40064865 is about 6329.6812715965. The cubic root of 40064865 is about 342.1799521489.

The spelling of 40064865 in words is "forty million, sixty-four thousand, eight hundred sixty-five".