340240403 has 4 divisors (see below), whose sum is σ = 355033488. Its totient is φ = 325447320.

The previous prime is 340240399. The next prime is 340240423. The reversal of 340240403 is 304042043.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 340240403 - 2² = 340240399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340240423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7396508 + ... + 7396553.

It is an arithmetic number, because the mean of its divisors is an integer number (88758372).

Almost surely, 2^340240403 is an apocalyptic number.

340240403 is a deficient number, since it is larger than the sum of its proper divisors (14793085).

340240403 is a wasteful number, since it uses less digits than its factorization.

340240403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14793084.

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

The square root of 340240403 is about 18445.6066042839. The cubic root of 340240403 is about 698.1176659786.

Adding to 340240403 its reverse (304042043), we get a palindrome (644282446).

The spelling of 340240403 in words is "three hundred forty million, two hundred forty thousand, four hundred three".