91535480 has 64 divisors (see below), whose sum is σ = 219399840. Its totient is φ = 34250752.

The previous prime is 91535453. The next prime is 91535489. The reversal of 91535480 is 8453519.

It is a self number, because there is not a number n which added to its sum of digits gives 91535480.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91535489) 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, 154064 + ... + 154656.

Almost surely, 2^91535480 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 91535480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109699920).

91535480 is an abundant number, since it is smaller than the sum of its proper divisors (127864360).

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

91535480 is a wasteful number, since it uses less digits than its factorization.

91535480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 91535480 is about 9567.4176244167. The cubic root of 91535480 is about 450.6746752114.

Adding to 91535480 its reverse (8453519), we get a palindrome (99988999).

The spelling of 91535480 in words is "ninety-one million, five hundred thirty-five thousand, four hundred eighty".