91214340 has 96 divisors (see below), whose sum is σ = 299061504. Its totient is φ = 20336640.

The previous prime is 91214329. The next prime is 91214341. The reversal of 91214340 is 4341219.

It is a self number, because there is not a number n which added to its sum of digits gives 91214340.

It is not an unprimeable number, because it can be changed into a prime (91214341) 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 31 ways as a sum of consecutive naturals, for example, 14572 + ... + 19868.

It is an arithmetic number, because the mean of its divisors is an integer number (3115224).

Almost surely, 2^91214340 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 91214340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149530752).

91214340 is an abundant number, since it is smaller than the sum of its proper divisors (207847164).

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

91214340 is a wasteful number, since it uses less digits than its factorization.

91214340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5357 (or 5355 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 91214340 is about 9550.6198751704. The cubic root of 91214340 is about 450.1470136942.

Adding to 91214340 its reverse (4341219), we get a palindrome (95555559).

The spelling of 91214340 in words is "ninety-one million, two hundred fourteen thousand, three hundred forty".