91308480 has 112 divisors (see below), whose sum is σ = 291876480. Its totient is φ = 24183808.

The previous prime is 91308461. The next prime is 91308523. The reversal of 91308480 is 8480319.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217711 + ... + 218129.

It is an arithmetic number, because the mean of its divisors is an integer number (2606040).

Almost surely, 2^91308480 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 91308480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145938240).

91308480 is an abundant number, since it is smaller than the sum of its proper divisors (200568000).

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

91308480 is a wasteful number, since it uses less digits than its factorization.

91308480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 91308480 is about 9555.5470800996. The cubic root of 91308480 is about 450.3018222091.

Adding to 91308480 its reverse (8480319), we get a palindrome (99788799).

The spelling of 91308480 in words is "ninety-one million, three hundred eight thousand, four hundred eighty".