340421434 has 8 divisors (see below), whose sum is σ = 512002260. Its totient is φ = 169754016.

The previous prime is 340421407. The next prime is 340421437. The reversal of 340421434 is 434124043.

It can be written as a sum of positive squares in 2 ways, for example, as 325622025 + 14799409 = 18045^2 + 3847^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 340421399 and 340421408.

It is not an unprimeable number, because it can be changed into a prime (340421437) 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, 227419 + ... + 228910.

Almost surely, 2^340421434 is an apocalyptic number.

340421434 is a deficient number, since it is larger than the sum of its proper divisors (171580826).

340421434 is a wasteful number, since it uses less digits than its factorization.

340421434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456704.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 340421434 is about 18450.5131093962. The cubic root of 340421434 is about 698.2414593615.

Adding to 340421434 its reverse (434124043), we get a palindrome (774545477).

The spelling of 340421434 in words is "three hundred forty million, four hundred twenty-one thousand, four hundred thirty-four".