91830680 has 64 divisors (see below), whose sum is σ = 215654400. Its totient is φ = 35153280.

The previous prime is 91830653. The next prime is 91830691. The reversal of 91830680 is 8603819.

It is a self number, because there is not a number n which added to its sum of digits gives 91830680.

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, 127361 + ... + 128079.

It is an arithmetic number, because the mean of its divisors is an integer number (3369600).

Almost surely, 2^91830680 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 91830680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107827200).

91830680 is an abundant number, since it is smaller than the sum of its proper divisors (123823720).

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

91830680 is a wasteful number, since it uses less digits than its factorization.

91830680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 860 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 91830680 is about 9582.8325666266. The cubic root of 91830680 is about 451.1586274583.

The spelling of 91830680 in words is "ninety-one million, eight hundred thirty thousand, six hundred eighty".