390388 has 12 divisors (see below), whose sum is σ = 723492. Its totient is φ = 183680.

The previous prime is 390373. The next prime is 390389. The reversal of 390388 is 883093.

It can be written as a sum of positive squares in 2 ways, for example, as 252004 + 138384 = 502^2 + 372^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390389) 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, 2803 + ... + 2938.

It is an arithmetic number, because the mean of its divisors is an integer number (60291).

2³⁹⁰³⁸⁸ is an apocalyptic number.

It is an amenable number.

390388 is a deficient number, since it is larger than the sum of its proper divisors (333104).

390388 is a wasteful number, since it uses less digits than its factorization.

390388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5762 (or 5760 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 390388 is about 624.8103712327. The cubic root of 390388 is about 73.0856566307.

The spelling of 390388 in words is "three hundred ninety thousand, three hundred eighty-eight".