91248280 has 16 divisors (see below), whose sum is σ = 205308720. Its totient is φ = 36499296.

The previous prime is 91248271. The next prime is 91248281. The reversal of 91248280 is 8284219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91248281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1140564 + ... + 1140643.

It is an arithmetic number, because the mean of its divisors is an integer number (12831795).

Almost surely, 2^91248280 is an apocalyptic number.

It is an amenable number.

91248280 is an abundant number, since it is smaller than the sum of its proper divisors (114060440).

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

91248280 is a wasteful number, since it uses less digits than its factorization.

91248280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281218 (or 2281214 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 91248280 is about 9552.3965579325. The cubic root of 91248280 is about 450.2028385974.

The spelling of 91248280 in words is "ninety-one million, two hundred forty-eight thousand, two hundred eighty".