91263648 has 96 divisors (see below), whose sum is σ = 278014464. Its totient is φ = 25673472.

The previous prime is 91263637. The next prime is 91263649. The reversal of 91263648 is 84636219.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (91263649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44011 + ... + 46037.

It is an arithmetic number, because the mean of its divisors is an integer number (2895984).

Almost surely, 2^91263648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91263648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139007232).

91263648 is an abundant number, since it is smaller than the sum of its proper divisors (186750816).

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

91263648 is a wasteful number, since it uses less digits than its factorization.

91263648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114 (or 2106 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 91263648 is about 9553.2009295314. The cubic root of 91263648 is about 450.2281115079.

The spelling of 91263648 in words is "ninety-one million, two hundred sixty-three thousand, six hundred forty-eight".