91730394 has 80 divisors (see below), whose sum is σ = 245190528. Its totient is φ = 25062048.

The previous prime is 91730377. The next prime is 91730399. The reversal of 91730394 is 49303719.

It is not an unprimeable number, because it can be changed into a prime (91730399) 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 39 ways as a sum of consecutive naturals, for example, 24324 + ... + 27840.

Almost surely, 2^91730394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91730394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122595264).

91730394 is an abundant number, since it is smaller than the sum of its proper divisors (153460134).

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

91730394 is a wasteful number, since it uses less digits than its factorization.

91730394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3561 (or 3552 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 91730394 is about 9577.5985507851. The cubic root of 91730394 is about 450.9943346011.

The spelling of 91730394 in words is "ninety-one million, seven hundred thirty thousand, three hundred ninety-four".