91854840 has 128 divisors (see below), whose sum is σ = 343595520. Its totient is φ = 19084800.

The previous prime is 91854839. The next prime is 91854857. The reversal of 91854840 is 4845819.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 4270 + ... + 14210.

It is an arithmetic number, because the mean of its divisors is an integer number (2684340).

Almost surely, 2^91854840 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 91854840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171797760).

91854840 is an abundant number, since it is smaller than the sum of its proper divisors (251740680).

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

91854840 is a wasteful number, since it uses less digits than its factorization.

91854840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9973 (or 9969 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 91854840 is about 9584.0930713344. The cubic root of 91854840 is about 451.1981895330.

The spelling of 91854840 in words is "ninety-one million, eight hundred fifty-four thousand, eight hundred forty".