40728508 has 12 divisors (see below), whose sum is σ = 72791712. Its totient is φ = 19930880.

The previous prime is 40728503. The next prime is 40728509. The reversal of 40728508 is 80582704.

It is a super-2 number, since 2×40728508² = 3317622727812128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40728503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108133 + ... + 108508.

It is an arithmetic number, because the mean of its divisors is an integer number (6065976).

Almost surely, 2^40728508 is an apocalyptic number.

It is an amenable number.

40728508 is a deficient number, since it is larger than the sum of its proper divisors (32063204).

40728508 is a wasteful number, since it uses less digits than its factorization.

40728508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216692 (or 216690 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 40728508 is about 6381.8890620254. The cubic root of 40728508 is about 344.0589294213.

The spelling of 40728508 in words is "forty million, seven hundred twenty-eight thousand, five hundred eight".