390386 has 4 divisors (see below), whose sum is σ = 585582. Its totient is φ = 195192.

The previous prime is 390373. The next prime is 390389. The reversal of 390386 is 683093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 683093 = 677 ⋅1009.

It can be written as a sum of positive squares in only one way, i.e., 383161 + 7225 = 619^2 + 85^2 .

It is not an unprimeable number, because it can be changed into a prime (390389) by changing a digit.

390386 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97595 + ... + 97598.

2³⁹⁰³⁸⁶ is an apocalyptic number.

390386 is a deficient number, since it is larger than the sum of its proper divisors (195196).

390386 is a wasteful number, since it uses less digits than its factorization.

390386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195195.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 390386 is about 624.8087707451. The cubic root of 390386 is about 73.0855318220.

The spelling of 390386 in words is "three hundred ninety thousand, three hundred eighty-six".