386557 has 4 divisors (see below), whose sum is σ = 392956. Its totient is φ = 380160.

The previous prime is 386549. The next prime is 386569. The reversal of 386557 is 755683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755683 = 227 ⋅3329.

It can be written as a sum of positive squares in 2 ways, for example, as 60516 + 326041 = 246^2 + 571^2 .

It is a cyclic number.

It is not a de Polignac number, because 386557 - 2³ = 386549 is a prime.

It is a Duffinian number.

386557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386537) 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, 3108 + ... + 3229.

It is an arithmetic number, because the mean of its divisors is an integer number (98239).

2³⁸⁶⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

386557 is a deficient number, since it is larger than the sum of its proper divisors (6399).

386557 is an equidigital number, since it uses as much as digits as its factorization.

386557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6398.

The product of its digits is 25200, while the sum is 34.

The square root of 386557 is about 621.7370826965. The cubic root of 386557 is about 72.8457994826.

The spelling of 386557 in words is "three hundred eighty-six thousand, five hundred fifty-seven".