91149028 has 12 divisors (see below), whose sum is σ = 159970300. Its totient is φ = 45443232.

The previous prime is 91149013. The next prime is 91149031. The reversal of 91149028 is 82094119.

It can be written as a sum of positive squares in 2 ways, for example, as 58339044 + 32809984 = 7638^2 + 5728^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91148984 and 91149002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31251 + ... + 34042.

Almost surely, 2^91149028 is an apocalyptic number.

It is an amenable number.

91149028 is a deficient number, since it is larger than the sum of its proper divisors (68821272).

91149028 is a wasteful number, since it uses less digits than its factorization.

91149028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65646 (or 65644 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 91149028 is about 9547.2000083794. The cubic root of 91149028 is about 450.0395487875.

The spelling of 91149028 in words is "ninety-one million, one hundred forty-nine thousand, twenty-eight".