917243540 has 48 divisors (see below), whose sum is σ = 1994291712. Its totient is φ = 354145536.

The previous prime is 917243507. The next prime is 917243549. The reversal of 917243540 is 45342719.

It is a self number, because there is not a number n which added to its sum of digits gives 917243540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (917243549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61937 + ... + 75303.

It is an arithmetic number, because the mean of its divisors is an integer number (41547744).

Almost surely, 2^917243540 is an apocalyptic number.

It is an amenable number.

917243540 is an abundant number, since it is smaller than the sum of its proper divisors (1077048172).

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

917243540 is a wasteful number, since it uses less digits than its factorization.

917243540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13496 (or 13494 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 917243540 is about 30286.0287921675. The cubic root of 917243540 is about 971.6165131300.

The spelling of 917243540 in words is "nine hundred seventeen million, two hundred forty-three thousand, five hundred forty".