340439402 has 8 divisors (see below), whose sum is σ = 510737412. Its totient is φ = 170193600.

The previous prime is 340439339. The next prime is 340439413. The reversal of 340439402 is 204934043.

340439402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 18451²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 340439401 + 1 = 18451^2 + 1^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18752 + ... + 32132.

Almost surely, 2^340439402 is an apocalyptic number.

340439402 is a deficient number, since it is larger than the sum of its proper divisors (170298010).

340439402 is a wasteful number, since it uses less digits than its factorization.

340439402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26104.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 340439402 is about 18451.0000270988. Note that the first 4 decimals coincide. The cubic root of 340439402 is about 698.2537439207.

The spelling of 340439402 in words is "three hundred forty million, four hundred thirty-nine thousand, four hundred two".