717945540 has 48 divisors (see below), whose sum is σ = 2164884288. Its totient is φ = 176724864.

The previous prime is 717945517. The next prime is 717945541. The reversal of 717945540 is 45549717.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 717945492 and 717945501.

It is not an unprimeable number, because it can be changed into a prime (717945541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459442 + ... + 461001.

It is an arithmetic number, because the mean of its divisors is an integer number (45101756).

Almost surely, 2^717945540 is an apocalyptic number.

It is an amenable number.

717945540 is an abundant number, since it is smaller than the sum of its proper divisors (1446938748).

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

717945540 is a wasteful number, since it uses less digits than its factorization.

717945540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920468 (or 920466 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The square root of 717945540 is about 26794.5057801035. The cubic root of 717945540 is about 895.4276495232.

The spelling of 717945540 in words is "seven hundred seventeen million, nine hundred forty-five thousand, five hundred forty".