91087268 has 48 divisors (see below), whose sum is σ = 171884160. Its totient is φ = 42138624.

The previous prime is 91087259. The next prime is 91087279. The reversal of 91087268 is 86278019.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526430 + ... + 526602.

It is an arithmetic number, because the mean of its divisors is an integer number (3580920).

Almost surely, 2^91087268 is an apocalyptic number.

It is an amenable number.

91087268 is a deficient number, since it is larger than the sum of its proper divisors (80796892).

91087268 is a wasteful number, since it uses less digits than its factorization.

91087268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 91087268 is about 9543.9650041270. The cubic root of 91087268 is about 449.9378811373.

Subtracting from 91087268 its reverse (86278019), we obtain a square (4809249 = 2193²).

The spelling of 91087268 in words is "ninety-one million, eighty-seven thousand, two hundred sixty-eight".