91505940 has 24 divisors (see below), whose sum is σ = 256216800. Its totient is φ = 24401568.

The previous prime is 91505929. The next prime is 91505959. The reversal of 91505940 is 4950519.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762490 + ... + 762609.

It is an arithmetic number, because the mean of its divisors is an integer number (10675700).

Almost surely, 2^91505940 is an apocalyptic number.

It is an amenable number.

91505940 is an abundant number, since it is smaller than the sum of its proper divisors (164710860).

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

91505940 is a wasteful number, since it uses less digits than its factorization.

91505940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525111 (or 1525109 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 91505940 is about 9565.8737185894. The cubic root of 91505940 is about 450.6261899601.

The spelling of 91505940 in words is "ninety-one million, five hundred five thousand, nine hundred forty".