91434920 has 64 divisors (see below), whose sum is σ = 212889600. Its totient is φ = 35320320.

The previous prime is 91434907. The next prime is 91434923. The reversal of 91434920 is 2943419.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91434923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208061 + ... + 208499.

It is an arithmetic number, because the mean of its divisors is an integer number (3326400).

Almost surely, 2^91434920 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 91434920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106444800).

91434920 is an abundant number, since it is smaller than the sum of its proper divisors (121454680).

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

91434920 is a wasteful number, since it uses less digits than its factorization.

91434920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 91434920 is about 9562.1608436587. The cubic root of 91434920 is about 450.5095791144.

The spelling of 91434920 in words is "ninety-one million, four hundred thirty-four thousand, nine hundred twenty".