340438 has 8 divisors (see below), whose sum is σ = 583632. Its totient is φ = 145896.

The previous prime is 340429. The next prime is 340447. The reversal of 340438 is 834043.

It is an interprime number because it is at equal distance from previous prime (340429) and next prime (340447).

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

It is a congruent number.

It is an unprimeable number.

340438 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12145 + ... + 12172.

It is an arithmetic number, because the mean of its divisors is an integer number (72954).

2³⁴⁰⁴³⁸ is an apocalyptic number.

340438 is a deficient number, since it is larger than the sum of its proper divisors (243194).

340438 is a wasteful number, since it uses less digits than its factorization.

340438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24326.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 340438 is about 583.4706505044. The cubic root of 340438 is about 69.8252785402.

The spelling of 340438 in words is "three hundred forty thousand, four hundred thirty-eight".