240400343 has 8 divisors (see below), whose sum is σ = 254756880. Its totient is φ = 226448320.

The previous prime is 240400309. The next prime is 240400409. The reversal of 240400343 is 343004042.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 240400343 - 2²⁰ = 239351767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240400243) 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 7 ways as a sum of consecutive naturals, for example, 99905 + ... + 102282.

It is an arithmetic number, because the mean of its divisors is an integer number (31844610).

Almost surely, 2^240400343 is an apocalyptic number.

240400343 is a deficient number, since it is larger than the sum of its proper divisors (14356537).

240400343 is a wasteful number, since it uses less digits than its factorization.

240400343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202257.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 240400343 is about 15504.8490157112. The cubic root of 240400343 is about 621.7918533415.

Adding to 240400343 its reverse (343004042), we get a palindrome (583404385).

The spelling of 240400343 in words is "two hundred forty million, four hundred thousand, three hundred forty-three".