634385 has 8 divisors (see below), whose sum is σ = 772416. Its totient is φ = 500080.

The previous prime is 634373. The next prime is 634397. The reversal of 634385 is 583436.

It is an interprime number because it is at equal distance from previous prime (634373) and next prime (634397).

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

It is not a de Polignac number, because 634385 - 2¹⁸ = 372241 is a prime.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539 + ... + 1248.

It is an arithmetic number, because the mean of its divisors is an integer number (96552).

2⁶³⁴³⁸⁵ is an apocalyptic number.

It is an amenable number.

634385 is a deficient number, since it is larger than the sum of its proper divisors (138031).

634385 is a wasteful number, since it uses less digits than its factorization.

634385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863.

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

The square root of 634385 is about 796.4828937272. The cubic root of 634385 is about 85.9246229742.

The spelling of 634385 in words is "six hundred thirty-four thousand, three hundred eighty-five".