240640705 has 16 divisors (see below), whose sum is σ = 295499520. Its totient is φ = 188042112.

The previous prime is 240640691. The next prime is 240640727. The reversal of 240640705 is 507046042.

It is not a de Polignac number, because 240640705 - 2¹⁵ = 240607937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212581 + ... + 213709.

It is an arithmetic number, because the mean of its divisors is an integer number (18468720).

Almost surely, 2^240640705 is an apocalyptic number.

It is an amenable number.

240640705 is a deficient number, since it is larger than the sum of its proper divisors (54858815).

240640705 is a wasteful number, since it uses less digits than its factorization.

240640705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 240640705 is about 15512.5982672149. The cubic root of 240640705 is about 621.9990152071. Note that the first 3 decimals are identical.

Adding to 240640705 its reverse (507046042), we get a palindrome (747686747).

The spelling of 240640705 in words is "two hundred forty million, six hundred forty thousand, seven hundred five".