91124448 has 24 divisors (see below), whose sum is σ = 239201928. Its totient is φ = 30374784.

The previous prime is 91124447. The next prime is 91124461. The reversal of 91124448 is 84442119.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91124441) 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, 474511 + ... + 474702.

It is an arithmetic number, because the mean of its divisors is an integer number (9966747).

Almost surely, 2^91124448 is an apocalyptic number.

It is an amenable number.

91124448 is an abundant number, since it is smaller than the sum of its proper divisors (148077480).

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

91124448 is a wasteful number, since it uses less digits than its factorization.

91124448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949226 (or 949218 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 91124448 is about 9545.9126331640. The cubic root of 91124448 is about 449.9990913562. Note that the first 3 decimals are identical.

The spelling of 91124448 in words is "ninety-one million, one hundred twenty-four thousand, four hundred forty-eight".