386945 has 8 divisors (see below), whose sum is σ = 500136. Its totient is φ = 285696.

The previous prime is 386927. The next prime is 386963. The reversal of 386945 is 549683.

It is an interprime number because it is at equal distance from previous prime (386927) and next prime (386963).

It can be written as a sum of positive squares in 4 ways, for example, as 18496 + 368449 = 136^2 + 607^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 386945 - 2⁸ = 386689 is a prime.

It is a d-powerful number, because it can be written as 3 + 8 + 9 + 6⁶ + 4⁹ + 5⁷ .

It is a plaindrome in base 11.

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, 2912 + ... + 3041.

It is an arithmetic number, because the mean of its divisors is an integer number (62517).

2³⁸⁶⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

386945 is a deficient number, since it is larger than the sum of its proper divisors (113191).

386945 is a wasteful number, since it uses less digits than its factorization.

386945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5971.

The product of its digits is 25920, while the sum is 35.

The square root of 386945 is about 622.0490334371. The cubic root of 386945 is about 72.8701639092.

It can be divided in two parts, 386 and 945, that added together give a palindrome (1331).

The spelling of 386945 in words is "three hundred eighty-six thousand, nine hundred forty-five".