91040200 has 24 divisors (see below), whose sum is σ = 211668930. Its totient is φ = 36416000.

The previous prime is 91040189. The next prime is 91040207. The reversal of 91040200 is 204019.

It can be written as a sum of positive squares in 3 ways, for example, as 42068196 + 48972004 = 6486^2 + 6998^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91040207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227401 + ... + 227800.

Almost surely, 2^91040200 is an apocalyptic number.

It is an amenable number.

91040200 is an abundant number, since it is smaller than the sum of its proper divisors (120628730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91040200 is a wasteful number, since it uses less digits than its factorization.

91040200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455217 (or 455208 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 91040200 is about 9541.4988340407. The cubic root of 91040200 is about 449.8603682004.

Adding to 91040200 its reverse (204019), we get a palindrome (91244219).

The spelling of 91040200 in words is "ninety-one million, forty thousand, two hundred".