91140000 has 360 divisors, whose sum is σ = 358985088. Its totient is φ = 20160000.

The previous prime is 91139999. The next prime is 91140061. The reversal of 91140000 is 4119.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2939985 + ... + 2940015.

Almost surely, 2^91140000 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 91140000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179492544).

91140000 is an abundant number, since it is smaller than the sum of its proper divisors (267845088).

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

91140000 is a wasteful number, since it uses less digits than its factorization.

91140000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 91140000 is about 9546.7271878901. The cubic root of 91140000 is about 450.0246900033.

Adding to 91140000 its reverse (4119), we get a palindrome (91144119).

The spelling of 91140000 in words is "ninety-one million, one hundred forty thousand".