91228108 has 6 divisors (see below), whose sum is σ = 159649196. Its totient is φ = 45614052.

The previous prime is 91228091. The next prime is 91228117. The reversal of 91228108 is 80182219.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 91228108.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11403510 + ... + 11403517.

Almost surely, 2^91228108 is an apocalyptic number.

It is an amenable number.

91228108 is a deficient number, since it is larger than the sum of its proper divisors (68421088).

91228108 is a wasteful number, since it uses less digits than its factorization.

91228108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22807031 (or 22807029 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 91228108 is about 9551.3406388842. The cubic root of 91228108 is about 450.1696611284.

The spelling of 91228108 in words is "ninety-one million, two hundred twenty-eight thousand, one hundred eight".