91807672 has 32 divisors (see below), whose sum is σ = 188179200. Its totient is φ = 41644000.

The previous prime is 91807643. The next prime is 91807679. The reversal of 91807672 is 27670819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91807679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62547 + ... + 63997.

It is an arithmetic number, because the mean of its divisors is an integer number (5880600).

Almost surely, 2^91807672 is an apocalyptic number.

It is an amenable number.

91807672 is an abundant number, since it is smaller than the sum of its proper divisors (96371528).

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

91807672 is a wasteful number, since it uses less digits than its factorization.

91807672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187 (or 2183 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 91807672 is about 9581.6320113016. The cubic root of 91807672 is about 451.1209453360.

The spelling of 91807672 in words is "ninety-one million, eight hundred seven thousand, six hundred seventy-two".