91268940 has 48 divisors (see below), whose sum is σ = 292061952. Its totient is φ = 20861376.

The previous prime is 91268939. The next prime is 91268963. The reversal of 91268940 is 4986219.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 108234 + ... + 109073.

It is an arithmetic number, because the mean of its divisors is an integer number (6084624).

Almost surely, 2^91268940 is an apocalyptic number.

It is an amenable number.

91268940 is an abundant number, since it is smaller than the sum of its proper divisors (200793012).

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

91268940 is a wasteful number, since it uses less digits than its factorization.

91268940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217326 (or 217324 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 91268940 is about 9553.4779007438. The cubic root of 91268940 is about 450.2368136260.

The spelling of 91268940 in words is "ninety-one million, two hundred sixty-eight thousand, nine hundred forty".