91228276 has 6 divisors (see below), whose sum is σ = 159649490. Its totient is φ = 45614136.

The previous prime is 91228271. The next prime is 91228279. The reversal of 91228276 is 67282219.

It can be written as a sum of positive squares in only one way, i.e., 56700900 + 34527376 = 7530^2 + 5876^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91228271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11403531 + ... + 11403538.

Almost surely, 2^91228276 is an apocalyptic number.

It is an amenable number.

91228276 is a deficient number, since it is larger than the sum of its proper divisors (68421214).

91228276 is a wasteful number, since it uses less digits than its factorization.

91228276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22807073 (or 22807071 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 91228276 is about 9551.3494334570. The cubic root of 91228276 is about 450.1699374630.

The spelling of 91228276 in words is "ninety-one million, two hundred twenty-eight thousand, two hundred seventy-six".