917865040 has 20 divisors (see below), whose sum is σ = 2134036404. Its totient is φ = 367145984.

The previous prime is 917865023. The next prime is 917865041. The reversal of 917865040 is 40568719.

It can be written as a sum of positive squares in 2 ways, for example, as 326597184 + 591267856 = 18072^2 + 24316^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 = 917864984 and 917865002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (917865041) 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 3 ways as a sum of consecutive naturals, for example, 5736577 + ... + 5736736.

Almost surely, 2^917865040 is an apocalyptic number.

It is an amenable number.

917865040 is an abundant number, since it is smaller than the sum of its proper divisors (1216171364).

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

917865040 is a wasteful number, since it uses less digits than its factorization.

917865040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11473326 (or 11473320 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 917865040 is about 30296.2875613498. The cubic root of 917865040 is about 971.8359108150.

The spelling of 917865040 in words is "nine hundred seventeen million, eight hundred sixty-five thousand, forty".