91411040 has 96 divisors (see below), whose sum is σ = 261382464. Its totient is φ = 29491200.

The previous prime is 91411037. The next prime is 91411043. The reversal of 91411040 is 4011419.

It is an interprime number because it is at equal distance from previous prime (91411037) and next prime (91411043).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91411043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16640 + ... + 21440.

It is an arithmetic number, because the mean of its divisors is an integer number (2722734).

Almost surely, 2^91411040 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 91411040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130691232).

91411040 is an abundant number, since it is smaller than the sum of its proper divisors (169971424).

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

91411040 is a wasteful number, since it uses less digits than its factorization.

91411040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4840 (or 4832 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 91411040 is about 9560.9120903813. The cubic root of 91411040 is about 450.4703559327.

Adding to 91411040 its reverse (4011419), we get a palindrome (95422459).

The spelling of 91411040 in words is "ninety-one million, four hundred eleven thousand, forty".