91085340 has 24 divisors (see below), whose sum is σ = 255039120. Its totient is φ = 24289408.

The previous prime is 91085327. The next prime is 91085381. The reversal of 91085340 is 4358019.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 91085298 and 91085307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758985 + ... + 759104.

It is an arithmetic number, because the mean of its divisors is an integer number (10626630).

Almost surely, 2^91085340 is an apocalyptic number.

It is an amenable number.

91085340 is an abundant number, since it is smaller than the sum of its proper divisors (163953780).

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

91085340 is a wasteful number, since it uses less digits than its factorization.

91085340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518101 (or 1518099 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 91085340 is about 9543.8639973545. The cubic root of 91085340 is about 449.9347065760.

The spelling of 91085340 in words is "ninety-one million, eighty-five thousand, three hundred forty".