240644345 has 8 divisors (see below), whose sum is σ = 289015560. Its totient is φ = 192353920.

The previous prime is 240644323. The next prime is 240644363. The reversal of 240644345 is 543446042.

It can be written as a sum of positive squares in 4 ways, for example, as 84419344 + 156225001 = 9188^2 + 12499^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 240644345 - 2¹² = 240640249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13436 + ... + 25725.

It is an arithmetic number, because the mean of its divisors is an integer number (36126945).

Almost surely, 2^240644345 is an apocalyptic number.

It is an amenable number.

240644345 is a deficient number, since it is larger than the sum of its proper divisors (48371215).

240644345 is a wasteful number, since it uses less digits than its factorization.

240644345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40395.

The product of its (nonzero) digits is 46080, while the sum is 32.

The square root of 240644345 is about 15512.7155907662. The cubic root of 240644345 is about 622.0021513695.

The spelling of 240644345 in words is "two hundred forty million, six hundred forty-four thousand, three hundred forty-five".