340403403 has 8 divisors (see below), whose sum is σ = 458035600. Its totient is φ = 224853408.

The previous prime is 340403389. The next prime is 340403417. The reversal of 340403403 is 304304043.

It is an interprime number because it is at equal distance from previous prime (340403389) and next prime (340403417).

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

It is not a de Polignac number, because 340403403 - 2⁴ = 340403387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340403403.

It is not an unprimeable number, because it can be changed into a prime (340403603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520168 + ... + 520821.

It is an arithmetic number, because the mean of its divisors is an integer number (57254450).

Almost surely, 2^340403403 is an apocalyptic number.

340403403 is a deficient number, since it is larger than the sum of its proper divisors (117632197).

340403403 is a wasteful number, since it uses less digits than its factorization.

340403403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041101.

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 340403403 is about 18450.0244715285. The cubic root of 340403403 is about 698.2291312951.

Adding to 340403403 its reverse (304304043), we get a palindrome (644707446).

The spelling of 340403403 in words is "three hundred forty million, four hundred three thousand, four hundred three".