91230160 has 180 divisors, whose sum is σ = 268506252. Its totient is φ = 28643328.

The previous prime is 91230137. The next prime is 91230163. The reversal of 91230160 is 6103219.

It can be written as a sum of positive squares in 6 ways, for example, as 23464336 + 67765824 = 4844^2 + 8232^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91230163) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2465662 + ... + 2465698.

Almost surely, 2^91230160 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 91230160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134253126).

91230160 is an abundant number, since it is smaller than the sum of its proper divisors (177276092).

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

91230160 is a wasteful number, since it uses less digits than its factorization.

91230160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 91230160 is about 9551.4480577554. The cubic root of 91230160 is about 450.1730363353.

Adding to 91230160 its reverse (6103219), we get a palindrome (97333379).

The spelling of 91230160 in words is "ninety-one million, two hundred thirty thousand, one hundred sixty".