91680030 has 96 divisors (see below), whose sum is σ = 259144704. Its totient is φ = 22353408.

The previous prime is 91680013. The next prime is 91680037. The reversal of 91680030 is 3008619.

It is a junction number, because it is equal to n+sod(n) for n = 91679976 and 91680003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91680037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148282 + ... + 148898.

It is an arithmetic number, because the mean of its divisors is an integer number (2699424).

Almost surely, 2^91680030 is an apocalyptic number.

91680030 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 91680030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129572352).

91680030 is an abundant number, since it is smaller than the sum of its proper divisors (167464674).

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

91680030 is a wasteful number, since it uses less digits than its factorization.

91680030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 91680030 is about 9574.9689294535. The cubic root of 91680030 is about 450.9117809497.

Adding to 91680030 its reverse (3008619), we get a palindrome (94688649).

The spelling of 91680030 in words is "ninety-one million, six hundred eighty thousand, thirty".