91160140 has 24 divisors (see below), whose sum is σ = 191615760. Its totient is φ = 36429888.

The previous prime is 91160131. The next prime is 91160161. The reversal of 91160140 is 4106119.

It is a super-2 number, since 2×91160140² = 16620342249639200, which contains 22 as substring.

It is an unprimeable number.

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, 40279 + ... + 42481.

It is an arithmetic number, because the mean of its divisors is an integer number (7983990).

Almost surely, 2^91160140 is an apocalyptic number.

It is an amenable number.

91160140 is an abundant number, since it is smaller than the sum of its proper divisors (100455620).

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

91160140 is a wasteful number, since it uses less digits than its factorization.

91160140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281 (or 4279 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 91160140 is about 9547.7819413726. The cubic root of 91160140 is about 450.0578361877.

Adding to 91160140 its reverse (4106119), we get a palindrome (95266259).

The spelling of 91160140 in words is "ninety-one million, one hundred sixty thousand, one hundred forty".