91447488 has 224 divisors, whose sum is σ = 311627520. Its totient is φ = 25989120.

The previous prime is 91447459. The next prime is 91447501. The reversal of 91447488 is 88474419.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322995 + ... + 323277.

Almost surely, 2^91447488 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 91447488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155813760).

91447488 is an abundant number, since it is smaller than the sum of its proper divisors (220180032).

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

91447488 is a wasteful number, since it uses less digits than its factorization.

91447488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 316 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 91447488 is about 9562.8179947126. The cubic root of 91447488 is about 450.5302194598.

The spelling of 91447488 in words is "ninety-one million, four hundred forty-seven thousand, four hundred eighty-eight".