40039664 has 30 divisors (see below), whose sum is σ = 90244224. Its totient is φ = 17159520.

The previous prime is 40039663. The next prime is 40039667. The reversal of 40039664 is 46693004.

40039664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 40039664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40039663) 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 5 ways as a sum of consecutive naturals, for example, 24752 + ... + 26319.

Almost surely, 2^40039664 is an apocalyptic number.

It is an amenable number.

40039664 is an abundant number, since it is smaller than the sum of its proper divisors (50204560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40039664 is a wasteful number, since it uses less digits than its factorization.

40039664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51093 (or 51080 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 40039664 is about 6327.6902579061. The cubic root of 40039664 is about 342.1081928021.

The spelling of 40039664 in words is "forty million, thirty-nine thousand, six hundred sixty-four".