340440543 has 16 divisors (see below), whose sum is σ = 520627200. Its totient is φ = 219638520.

The previous prime is 340440517. The next prime is 340440553. The reversal of 340440543 is 345044043.

It is not a de Polignac number, because 340440543 - 2⁵ = 340440511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340440553) 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 15 ways as a sum of consecutive naturals, for example, 202533 + ... + 204206.

It is an arithmetic number, because the mean of its divisors is an integer number (32539200).

Almost surely, 2^340440543 is an apocalyptic number.

340440543 is a deficient number, since it is larger than the sum of its proper divisors (180186657).

340440543 is a wasteful number, since it uses less digits than its factorization.

340440543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406779 (or 406773 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 340440543 is about 18451.0309468062. The cubic root of 340440543 is about 698.2545239975.

Adding to 340440543 its reverse (345044043), we get a palindrome (685484586).

The spelling of 340440543 in words is "three hundred forty million, four hundred forty thousand, five hundred forty-three".