91459840 has 36 divisors (see below), whose sum is σ = 219077964. Its totient is φ = 36583424.

The previous prime is 91459783. The next prime is 91459859. The reversal of 91459840 is 4895419.

It can be written as a sum of positive squares in 2 ways, for example, as 56791296 + 34668544 = 7536^2 + 5888^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 91459793 and 91459802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34447 + ... + 37006.

It is an arithmetic number, because the mean of its divisors is an integer number (6085499).

Almost surely, 2^91459840 is an apocalyptic number.

It is an amenable number.

91459840 is an abundant number, since it is smaller than the sum of its proper divisors (127618124).

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

91459840 is an equidigital number, since it uses as much as digits as its factorization.

91459840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71474 (or 71460 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 91459840 is about 9563.4638076379. The cubic root of 91459840 is about 450.5505032272.

The spelling of 91459840 in words is "ninety-one million, four hundred fifty-nine thousand, eight hundred forty".