917241640 has 64 divisors (see below), whose sum is σ = 2434728960. Its totient is φ = 304335360.

The previous prime is 917241617. The next prime is 917241737. The reversal of 917241640 is 46142719.

It is a super-2 number, since 2×917241640² = 1682664452299779200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 917241596 and 917241605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44157 + ... + 61516.

It is an arithmetic number, because the mean of its divisors is an integer number (38042640).

Almost surely, 2^917241640 is an apocalyptic number.

It is an amenable number.

917241640 is an abundant number, since it is smaller than the sum of its proper divisors (1517487320).

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

917241640 is a wasteful number, since it uses less digits than its factorization.

917241640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105722 (or 105718 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 917241640 is about 30285.9974245525. The cubic root of 917241640 is about 971.6158422531.

The spelling of 917241640 in words is "nine hundred seventeen million, two hundred forty-one thousand, six hundred forty".