91228886 has 24 divisors (see below), whose sum is σ = 162894600. Its totient is φ = 38187072.

The previous prime is 91228883. The next prime is 91228901. The reversal of 91228886 is 68882219.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91228883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6611 + ... + 15038.

It is an arithmetic number, because the mean of its divisors is an integer number (6787275).

Almost surely, 2^91228886 is an apocalyptic number.

91228886 is a deficient number, since it is larger than the sum of its proper divisors (71665714).

91228886 is a wasteful number, since it uses less digits than its factorization.

91228886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21708 (or 21701 counting only the distinct ones).

The product of its digits is 110592, while the sum is 44.

The square root of 91228886 is about 9551.3813660643. The cubic root of 91228886 is about 450.1709408181.

The spelling of 91228886 in words is "ninety-one million, two hundred twenty-eight thousand, eight hundred eighty-six".