40311728 has 40 divisors (see below), whose sum is σ = 80354976. Its totient is φ = 19584000.

The previous prime is 40311727. The next prime is 40311731. The reversal of 40311728 is 82711304.

40311728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 40311697 and 40311706.

It is not an unprimeable number, because it can be changed into a prime (40311721) 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 7 ways as a sum of consecutive naturals, for example, 100328 + ... + 100728.

Almost surely, 2^40311728 is an apocalyptic number.

It is an amenable number.

40311728 is a deficient number, since it is larger than the sum of its proper divisors (40043248).

40311728 is a wasteful number, since it uses less digits than its factorization.

40311728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 40311728 is about 6349.1517543685. The cubic root of 40311728 is about 342.8813037206.

The spelling of 40311728 in words is "forty million, three hundred eleven thousand, seven hundred twenty-eight".