91889340 has 48 divisors (see below), whose sum is σ = 259586208. Its totient is φ = 24285184.

The previous prime is 91889311. The next prime is 91889351. The reversal of 91889340 is 4398819.

It is a junction number, because it is equal to n+sod(n) for n = 91889292 and 91889301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4 + ... + 13556.

It is an arithmetic number, because the mean of its divisors is an integer number (5408046).

Almost surely, 2^91889340 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 91889340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129793104).

91889340 is an abundant number, since it is smaller than the sum of its proper divisors (167696868).

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

91889340 is a wasteful number, since it uses less digits than its factorization.

91889340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13678 (or 13676 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 91889340 is about 9585.8927596755. The cubic root of 91889340 is about 451.2546713656.

It can be divided in two parts, 91889 and 340, that added together give a palindrome (92229).

The spelling of 91889340 in words is "ninety-one million, eight hundred eighty-nine thousand, three hundred forty".