40640464 has 20 divisors (see below), whose sum is σ = 79229056. Its totient is φ = 20194272.

The previous prime is 40640447. The next prime is 40640497. The reversal of 40640464 is 46404604.

40640464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5184 + ... + 10399.

Almost surely, 2^40640464 is an apocalyptic number.

It is an amenable number.

40640464 is a deficient number, since it is larger than the sum of its proper divisors (38588592).

40640464 is a wasteful number, since it uses less digits than its factorization.

40640464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15754 (or 15748 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 40640464 is about 6374.9873725365. The cubic root of 40640464 is about 343.8108298300.

The spelling of 40640464 in words is "forty million, six hundred forty thousand, four hundred sixty-four".