91286316 has 72 divisors (see below), whose sum is σ = 260442000. Its totient is φ = 26705280.

The previous prime is 91286309. The next prime is 91286329. The reversal of 91286316 is 61368219.

91286316 is a `hidden beast` number, since 9 + 12 + 8 + 631 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7510 + ... + 15458.

It is an arithmetic number, because the mean of its divisors is an integer number (3617250).

Almost surely, 2^91286316 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 91286316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130221000).

91286316 is an abundant number, since it is smaller than the sum of its proper divisors (169155684).

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

91286316 is a wasteful number, since it uses less digits than its factorization.

91286316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7999 (or 7994 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 91286316 is about 9554.3872644979. The cubic root of 91286316 is about 450.2653842016.

The spelling of 91286316 in words is "ninety-one million, two hundred eighty-six thousand, three hundred sixteen".