91483840 has 56 divisors (see below), whose sum is σ = 248972832. Its totient is φ = 31365120.

The previous prime is 91483829. The next prime is 91483849. The reversal of 91483840 is 4838419.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×91483840² = 16738585962291200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91483840.

It is not an unprimeable number, because it can be changed into a prime (91483849) 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, 18181 + ... + 22660.

Almost surely, 2^91483840 is an apocalyptic number.

It is an amenable number.

91483840 is an abundant number, since it is smaller than the sum of its proper divisors (157488992).

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

91483840 is a wasteful number, since it uses less digits than its factorization.

91483840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40865 (or 40855 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 91483840 is about 9564.7185008237. The cubic root of 91483840 is about 450.5899094715.

The spelling of 91483840 in words is "ninety-one million, four hundred eighty-three thousand, eight hundred forty".