345638 has 8 divisors (see below), whose sum is σ = 529632. Its totient is φ = 169096.

The previous prime is 345637. The next prime is 345643. The reversal of 345638 is 836543.

345638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

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

It is a self number, because there is not a number n which added to its sum of digits gives 345638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345637) 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, 1745 + ... + 1932.

It is an arithmetic number, because the mean of its divisors is an integer number (66204).

2³⁴⁵⁶³⁸ is an apocalyptic number.

345638 is a deficient number, since it is larger than the sum of its proper divisors (183994).

345638 is a wasteful number, since it uses less digits than its factorization.

345638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726.

The product of its digits is 8640, while the sum is 29.

The square root of 345638 is about 587.9098570359. The cubic root of 345638 is about 70.1789976755.

It can be divided in two parts, 3456 and 38, that multiplied together give a triangular number (131328 = T₅₁₂).

The spelling of 345638 in words is "three hundred forty-five thousand, six hundred thirty-eight".