40646624 has 24 divisors (see below), whose sum is σ = 84236040. Its totient is φ = 19253376.

The previous prime is 40646597. The next prime is 40646629. The reversal of 40646624 is 42664604.

40646624 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40646629) 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 3 ways as a sum of consecutive naturals, for example, 32819 + ... + 34034.

It is an arithmetic number, because the mean of its divisors is an integer number (3509835).

Almost surely, 2^40646624 is an apocalyptic number.

It is an amenable number.

40646624 is an abundant number, since it is smaller than the sum of its proper divisors (43589416).

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

40646624 is a wasteful number, since it uses less digits than its factorization.

40646624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66882 (or 66874 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 40646624 is about 6375.4704924421. The cubic root of 40646624 is about 343.8281997737.

The spelling of 40646624 in words is "forty million, six hundred forty-six thousand, six hundred twenty-four".