91043760 has 160 divisors (see below), whose sum is σ = 297123840. Its totient is φ = 23030784.

The previous prime is 91043737. The next prime is 91043767. The reversal of 91043760 is 6734019.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (91043767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 716817 + ... + 716943.

It is an arithmetic number, because the mean of its divisors is an integer number (1857024).

Almost surely, 2^91043760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91043760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148561920).

91043760 is an abundant number, since it is smaller than the sum of its proper divisors (206080080).

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

91043760 is a wasteful number, since it uses less digits than its factorization.

91043760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 91043760 is about 9541.6853857167. The cubic root of 91043760 is about 449.8662318446.

Adding to 91043760 its reverse (6734019), we get a palindrome (97777779).

The spelling of 91043760 in words is "ninety-one million, forty-three thousand, seven hundred sixty".