40315816 has 8 divisors (see below), whose sum is σ = 75592170. Its totient is φ = 20157904.

The previous prime is 40315787. The next prime is 40315817. The reversal of 40315816 is 61851304.

40315816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 40271716 + 44100 = 6346^2 + 210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (40315817) 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 as a sum of consecutive naturals, namely, 2519731 + ... + 2519746.

Almost surely, 2^40315816 is an apocalyptic number.

It is an amenable number.

40315816 is a deficient number, since it is larger than the sum of its proper divisors (35276354).

40315816 is a wasteful number, since it uses less digits than its factorization.

40315816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5039483 (or 5039479 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 40315816 is about 6349.4736789753. The cubic root of 40315816 is about 342.8928938249.

The spelling of 40315816 in words is "forty million, three hundred fifteen thousand, eight hundred sixteen".