240040406 has 8 divisors (see below), whose sum is σ = 360692904. Its totient is φ = 119809440.

The previous prime is 240040403. The next prime is 240040439. The reversal of 240040406 is 604040042.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240040403) 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 in 3 ways as a sum of consecutive naturals, for example, 103955 + ... + 106238.

It is an arithmetic number, because the mean of its divisors is an integer number (45086613).

Almost surely, 2^240040406 is an apocalyptic number.

240040406 is a deficient number, since it is larger than the sum of its proper divisors (120652498).

240040406 is a wasteful number, since it uses less digits than its factorization.

240040406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210766.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 240040406 is about 15493.2374279877. The cubic root of 240040406 is about 621.4813744662.

Adding to 240040406 its reverse (604040042), we get a palindrome (844080448).

The spelling of 240040406 in words is "two hundred forty million, forty thousand, four hundred six".