386649 has 6 divisors (see below), whose sum is σ = 558506. Its totient is φ = 257760.

The previous prime is 386647. The next prime is 386651. The reversal of 386649 is 946683.

386649 is a `hidden beast` number, since 3 + 8 + 6 + 649 = 666.

It is an interprime number because it is at equal distance from previous prime (386647) and next prime (386651).

It can be written as a sum of positive squares in only one way, i.e., 257049 + 129600 = 507^2 + 360^2 .

It is not a de Polignac number, because 386649 - 2¹ = 386647 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21472 + ... + 21489.

2³⁸⁶⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

386649 is a deficient number, since it is larger than the sum of its proper divisors (171857).

386649 is a wasteful number, since it uses less digits than its factorization.

386649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42967 (or 42964 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 386649 is about 621.8110645526. The cubic root of 386649 is about 72.8515780887.

It can be divided in two parts, 386 and 649, that added together give a triangular number (1035 = T₄₅).

The spelling of 386649 in words is "three hundred eighty-six thousand, six hundred forty-nine".