91473280 has 64 divisors (see below), whose sum is σ = 223404480. Its totient is φ = 35799040.

The previous prime is 91473271. The next prime is 91473289. The reversal of 91473280 is 8237419.

It is an interprime number because it is at equal distance from previous prime (91473271) and next prime (91473289).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91473289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28560 + ... + 31600.

It is an arithmetic number, because the mean of its divisors is an integer number (3490695).

Almost surely, 2^91473280 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 91473280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111702240).

91473280 is an abundant number, since it is smaller than the sum of its proper divisors (131931200).

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

91473280 is a wasteful number, since it uses less digits than its factorization.

91473280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107 (or 3095 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 91473280 is about 9564.1664561006. The cubic root of 91473280 is about 450.5725715732.

The spelling of 91473280 in words is "ninety-one million, four hundred seventy-three thousand, two hundred eighty".