40728533 has 8 divisors (see below), whose sum is σ = 42931200. Its totient is φ = 38531808.

The previous prime is 40728521. The next prime is 40728577. The reversal of 40728533 is 33582704.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40728533 - 2⁴ = 40728517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40728533.

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 7 ways as a sum of consecutive naturals, for example, 23660 + ... + 25322.

It is an arithmetic number, because the mean of its divisors is an integer number (5366400).

Almost surely, 2^40728533 is an apocalyptic number.

It is an amenable number.

40728533 is a deficient number, since it is larger than the sum of its proper divisors (2202667).

40728533 is a wasteful number, since it uses less digits than its factorization.

40728533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 40728533 is about 6381.8910206928. The cubic root of 40728533 is about 344.0589998181.

The spelling of 40728533 in words is "forty million, seven hundred twenty-eight thousand, five hundred thirty-three".