91465280 has 56 divisors (see below), whose sum is σ = 221952312. Its totient is φ = 35889152.

The previous prime is 91465271. The next prime is 91465307. The reversal of 91465280 is 8256419.

It can be written as a sum of positive squares in 4 ways, for example, as 39740416 + 51724864 = 6304^2 + 7192^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 91465280.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14264 + ... + 19656.

Almost surely, 2^91465280 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 91465280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110976156).

91465280 is an abundant number, since it is smaller than the sum of its proper divisors (130487032).

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

91465280 is a wasteful number, since it uses less digits than its factorization.

91465280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463 (or 5453 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 91465280 is about 9563.7482191869. The cubic root of 91465280 is about 450.5594359134.

The spelling of 91465280 in words is "ninety-one million, four hundred sixty-five thousand, two hundred eighty".