91246540 has 96 divisors (see below), whose sum is σ = 240920064. Its totient is φ = 28200960.

The previous prime is 91246517. The next prime is 91246583. The reversal of 91246540 is 4564219.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297067 + ... + 297373.

It is an arithmetic number, because the mean of its divisors is an integer number (2509584).

Almost surely, 2^91246540 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 91246540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120460032).

91246540 is an abundant number, since it is smaller than the sum of its proper divisors (149673524).

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

91246540 is a wasteful number, since it uses less digits than its factorization.

91246540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 91246540 is about 9552.3054808774. The cubic root of 91246540 is about 450.1999769620.

The spelling of 91246540 in words is "ninety-one million, two hundred forty-six thousand, five hundred forty".