240645305 has 8 divisors (see below), whose sum is σ = 293508744. Its totient is φ = 189360000.

The previous prime is 240645271. The next prime is 240645323. The reversal of 240645305 is 503546042.

It can be written as a sum of positive squares in 4 ways, for example, as 24790441 + 215854864 = 4979^2 + 14692^2 .

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

It is not a de Polignac number, because 240645305 - 2⁸ = 240645049 is a prime.

It is a Duffinian number.

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, 394196 + ... + 394805.

It is an arithmetic number, because the mean of its divisors is an integer number (36688593).

Almost surely, 2^240645305 is an apocalyptic number.

It is an amenable number.

240645305 is a deficient number, since it is larger than the sum of its proper divisors (52863439).

240645305 is an equidigital number, since it uses as much as digits as its factorization.

240645305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789067.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 240645305 is about 15512.7465330934. The cubic root of 240645305 is about 622.0029784840.

The spelling of 240645305 in words is "two hundred forty million, six hundred forty-five thousand, three hundred five".