91804160 has 160 divisors (see below), whose sum is σ = 259269120. Its totient is φ = 30523392.

The previous prime is 91804147. The next prime is 91804189. The reversal of 91804160 is 6140819.

It is a tau number, because it is divible by the number of its divisors (160).

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, 842186 + ... + 842294.

It is an arithmetic number, because the mean of its divisors is an integer number (1620432).

Almost surely, 2^91804160 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 91804160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129634560).

91804160 is an abundant number, since it is smaller than the sum of its proper divisors (167464960).

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

91804160 is a wasteful number, since it uses less digits than its factorization.

91804160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 91804160 is about 9581.4487422310. The cubic root of 91804160 is about 451.1151928866.

Adding to 91804160 its reverse (6140819), we get a palindrome (97944979).

The spelling of 91804160 in words is "ninety-one million, eight hundred four thousand, one hundred sixty".