91430880 has 96 divisors (see below), whose sum is σ = 292408704. Its totient is φ = 24009216.

The previous prime is 91430863. The next prime is 91430893. The reversal of 91430880 is 8803419.

It is a tau number, because it is divible by the number of its divisors (96).

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, 30739 + ... + 33581.

It is an arithmetic number, because the mean of its divisors is an integer number (3045924).

Almost surely, 2^91430880 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 91430880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146204352).

91430880 is an abundant number, since it is smaller than the sum of its proper divisors (200977824).

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

91430880 is a wasteful number, since it uses less digits than its factorization.

91430880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928 (or 2920 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 91430880 is about 9561.9495920027. The cubic root of 91430880 is about 450.5029438467.

The spelling of 91430880 in words is "ninety-one million, four hundred thirty thousand, eight hundred eighty".