91853140 has 12 divisors (see below), whose sum is σ = 192891636. Its totient is φ = 36741248.

The previous prime is 91853123. The next prime is 91853141. The reversal of 91853140 is 4135819.

It can be written as a sum of positive squares in 2 ways, for example, as 34880836 + 56972304 = 5906^2 + 7548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91853141) 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 3 ways as a sum of consecutive naturals, for example, 2296309 + ... + 2296348.

It is an arithmetic number, because the mean of its divisors is an integer number (16074303).

Almost surely, 2^91853140 is an apocalyptic number.

It is an amenable number.

91853140 is an abundant number, since it is smaller than the sum of its proper divisors (101038496).

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

91853140 is a wasteful number, since it uses less digits than its factorization.

91853140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4592666 (or 4592664 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 91853140 is about 9584.0043823028. The cubic root of 91853140 is about 451.1954060046.

Adding to 91853140 its reverse (4135819), we get a palindrome (95988959).

The spelling of 91853140 in words is "ninety-one million, eight hundred fifty-three thousand, one hundred forty".