347638 has 4 divisors (see below), whose sum is σ = 521460. Its totient is φ = 173818.

The previous prime is 347629. The next prime is 347651. The reversal of 347638 is 836743.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836743 = 419 ⋅1997.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86908 + ... + 86911.

It is an arithmetic number, because the mean of its divisors is an integer number (130365).

2³⁴⁷⁶³⁸ is an apocalyptic number.

347638 is a deficient number, since it is larger than the sum of its proper divisors (173822).

347638 is a wasteful number, since it uses less digits than its factorization.

347638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173821.

The product of its digits is 12096, while the sum is 31.

The square root of 347638 is about 589.6083445814. The cubic root of 347638 is about 70.3140986962.

The spelling of 347638 in words is "three hundred forty-seven thousand, six hundred thirty-eight".