91103028 has 24 divisors (see below), whose sum is σ = 218320032. Its totient is φ = 29546784.

The previous prime is 91102997. The next prime is 91103029. The reversal of 91103028 is 82030119.

It is a junction number, because it is equal to n+sod(n) for n = 91102989 and 91103007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91103029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102150 + ... + 103037.

It is an arithmetic number, because the mean of its divisors is an integer number (9096668).

Almost surely, 2^91103028 is an apocalyptic number.

It is an amenable number.

91103028 is an abundant number, since it is smaller than the sum of its proper divisors (127217004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91103028 is a wasteful number, since it uses less digits than its factorization.

91103028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205231 (or 205229 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 91103028 is about 9544.7906210666. The cubic root of 91103028 is about 449.9638291914.

The spelling of 91103028 in words is "ninety-one million, one hundred three thousand, twenty-eight".