91984512 has 32 divisors (see below), whose sum is σ = 244334880. Its totient is φ = 30661376.

The previous prime is 91984493. The next prime is 91984517. The reversal of 91984512 is 21548919.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×91984512² = 16922300895756288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91984517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119388 + ... + 120155.

It is an arithmetic number, because the mean of its divisors is an integer number (7635465).

Almost surely, 2^91984512 is an apocalyptic number.

It is an amenable number.

91984512 is an abundant number, since it is smaller than the sum of its proper divisors (152350368).

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

91984512 is a wasteful number, since it uses less digits than its factorization.

91984512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239560 (or 239548 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 91984512 is about 9590.8556448317. The cubic root of 91984512 is about 451.4104093837.

The spelling of 91984512 in words is "ninety-one million, nine hundred eighty-four thousand, five hundred twelve".