240642266 has 4 divisors (see below), whose sum is σ = 360963402. Its totient is φ = 120321132.

The previous prime is 240642263. The next prime is 240642287. The reversal of 240642266 is 662246042.

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

It can be written as a sum of positive squares in only one way, i.e., 196140025 + 44502241 = 14005^2 + 6671^2 .

It is a super-2 number, since 2×240642266² = 115817400371229512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (240642263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60160565 + ... + 60160568.

Almost surely, 2^240642266 is an apocalyptic number.

240642266 is a deficient number, since it is larger than the sum of its proper divisors (120321136).

240642266 is a wasteful number, since it uses less digits than its factorization.

240642266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120321135.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 240642266 is about 15512.6485810773. The cubic root of 240642266 is about 622.0003601422. Note that the first 3 decimals are identical.

The spelling of 240642266 in words is "two hundred forty million, six hundred forty-two thousand, two hundred sixty-six".