385647 has 4 divisors (see below), whose sum is σ = 514200. Its totient is φ = 257096.

The previous prime is 385639. The next prime is 385657. The reversal of 385647 is 746583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746583 = 3 ⋅248861.

It is a cyclic number.

It is not a de Polignac number, because 385647 - 2³ = 385639 is a prime.

It is a D-number.

385647 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385607) 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, 64272 + ... + 64277.

It is an arithmetic number, because the mean of its divisors is an integer number (128550).

2³⁸⁵⁶⁴⁷ is an apocalyptic number.

385647 is a deficient number, since it is larger than the sum of its proper divisors (128553).

385647 is a wasteful number, since it uses less digits than its factorization.

385647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128552.

The product of its digits is 20160, while the sum is 33.

The square root of 385647 is about 621.0048308991. The cubic root of 385647 is about 72.7885920819.

The spelling of 385647 in words is "three hundred eighty-five thousand, six hundred forty-seven".