91840512 has 112 divisors (see below), whose sum is σ = 254002032. Its totient is φ = 29491200.

The previous prime is 91840487. The next prime is 91840517. The reversal of 91840512 is 21504819.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 91840512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91840517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909262 + ... + 909362.

Almost surely, 2^91840512 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 91840512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127001016).

91840512 is an abundant number, since it is smaller than the sum of its proper divisors (162161520).

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

91840512 is a wasteful number, since it uses less digits than its factorization.

91840512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 91840512 is about 9583.3455536154. The cubic root of 91840512 is about 451.1747282259.

The spelling of 91840512 in words is "ninety-one million, eight hundred forty thousand, five hundred twelve".