40643616 has 96 divisors (see below), whose sum is σ = 118964160. Its totient is φ = 12063744.

The previous prime is 40643609. The next prime is 40643621. The reversal of 40643616 is 61634604.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35631 + ... + 36753.

It is an arithmetic number, because the mean of its divisors is an integer number (1239210).

Almost surely, 2^40643616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40643616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59482080).

40643616 is an abundant number, since it is smaller than the sum of its proper divisors (78320544).

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

40643616 is a wasteful number, since it uses less digits than its factorization.

40643616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 1170 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 40643616 is about 6375.2345839192. The cubic root of 40643616 is about 343.8197180464.

The spelling of 40643616 in words is "forty million, six hundred forty-three thousand, six hundred sixteen".