91547228 has 12 divisors (see below), whose sum is σ = 160408080. Its totient is φ = 45716352.

The previous prime is 91547221. The next prime is 91547233. The reversal of 91547228 is 82274519.

It is a junction number, because it is equal to n+sod(n) for n = 91547191 and 91547200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91547221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10613 + ... + 17196.

It is an arithmetic number, because the mean of its divisors is an integer number (13367340).

Almost surely, 2^91547228 is an apocalyptic number.

It is an amenable number.

91547228 is a deficient number, since it is larger than the sum of its proper divisors (68860852).

91547228 is a wasteful number, since it uses less digits than its factorization.

91547228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28636 (or 28634 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 91547228 is about 9568.0315634931. The cubic root of 91547228 is about 450.6939548015.

The spelling of 91547228 in words is "ninety-one million, five hundred forty-seven thousand, two hundred twenty-eight".