91033028 has 24 divisors (see below), whose sum is σ = 177559200. Its totient is φ = 40583808.

The previous prime is 91032973. The next prime is 91033039. The reversal of 91033028 is 82033019.

It is a junction number, because it is equal to n+sod(n) for n = 91032988 and 91033006.

It is an unprimeable number.

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, 33938 + ... + 36521.

It is an arithmetic number, because the mean of its divisors is an integer number (7398300).

Almost surely, 2^91033028 is an apocalyptic number.

It is an amenable number.

91033028 is a deficient number, since it is larger than the sum of its proper divisors (86526172).

91033028 is a wasteful number, since it uses less digits than its factorization.

91033028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70499 (or 70497 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 91033028 is about 9541.1229947004. The cubic root of 91033028 is about 449.8485547989.

Subtracting from 91033028 its reverse (82033019), we obtain a palindrome (9000009).

The spelling of 91033028 in words is "ninety-one million, thirty-three thousand, twenty-eight".