40644608 has 26 divisors (see below), whose sum is σ = 81287484. Its totient is φ = 20320256.

The previous prime is 40644601. The next prime is 40644619. The reversal of 40644608 is 80644604.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (40644601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 866 + ... + 9057.

Almost surely, 2^40644608 is an apocalyptic number.

It is an amenable number.

40644608 is a deficient number, since it is larger than the sum of its proper divisors (40642876).

40644608 is an frugal number, since it uses more digits than its factorization.

40644608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9947 (or 9925 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 40644608 is about 6375.3123845032. The cubic root of 40644608 is about 343.8225152581.

The spelling of 40644608 in words is "forty million, six hundred forty-four thousand, six hundred eight".