240290317 has 4 divisors (see below), whose sum is σ = 248576220. Its totient is φ = 232004416.

The previous prime is 240290293. The next prime is 240290327. The reversal of 240290317 is 713092042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63027721 + 177262596 = 7939^2 + 13314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240290317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240290327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4142908 + ... + 4142965.

It is an arithmetic number, because the mean of its divisors is an integer number (62144055).

Almost surely, 2^240290317 is an apocalyptic number.

It is an amenable number.

240290317 is a deficient number, since it is larger than the sum of its proper divisors (8285903).

240290317 is an equidigital number, since it uses as much as digits as its factorization.

240290317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8285902.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 240290317 is about 15501.3004938295. The cubic root of 240290317 is about 621.6969786707.

The spelling of 240290317 in words is "two hundred forty million, two hundred ninety thousand, three hundred seventeen".