90728866 has 8 divisors (see below), whose sum is σ = 136154304. Its totient is φ = 45344100.

The previous prime is 90728851. The next prime is 90728867. The reversal of 90728866 is 66882709.

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

It is not an unprimeable number, because it can be changed into a prime (90728867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3790 + ... + 13993.

It is an arithmetic number, because the mean of its divisors is an integer number (17019288).

Almost surely, 2^90728866 is an apocalyptic number.

90728866 is a deficient number, since it is larger than the sum of its proper divisors (45425438).

90728866 is a wasteful number, since it uses less digits than its factorization.

90728866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20336.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 90728866 is about 9525.1701297142. The cubic root of 90728866 is about 449.3469803980.

The spelling of 90728866 in words is "ninety million, seven hundred twenty-eight thousand, eight hundred sixty-six".