90728443 has 8 divisors (see below), whose sum is σ = 101077200. Its totient is φ = 80861088.

The previous prime is 90728441. The next prime is 90728461. The reversal of 90728443 is 34482709.

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 90728443 - 2¹ = 90728441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90728441) 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, 119953 + ... + 120706.

It is an arithmetic number, because the mean of its divisors is an integer number (12634650).

Almost surely, 2^90728443 is an apocalyptic number.

90728443 is a deficient number, since it is larger than the sum of its proper divisors (10348757).

90728443 is a wasteful number, since it uses less digits than its factorization.

90728443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240701.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 90728443 is about 9525.1479253605. The cubic root of 90728443 is about 449.3462820753.

The spelling of 90728443 in words is "ninety million, seven hundred twenty-eight thousand, four hundred forty-three".