91411328 has 16 divisors (see below), whose sum is σ = 182108760. Its totient is φ = 45705600.

The previous prime is 91411321. The next prime is 91411339. The reversal of 91411328 is 82311419.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 91411328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91411321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356948 + ... + 357203.

Almost surely, 2^91411328 is an apocalyptic number.

It is an amenable number.

91411328 is a deficient number, since it is larger than the sum of its proper divisors (90697432).

91411328 is an equidigital number, since it uses as much as digits as its factorization.

91411328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714165 (or 714153 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 91411328 is about 9560.9271516940. The cubic root of 91411328 is about 450.4708290168.

Subtracting from 91411328 its reverse (82311419), we obtain a palindrome (9099909).

The spelling of 91411328 in words is "ninety-one million, four hundred eleven thousand, three hundred twenty-eight".