390529 has 4 divisors (see below), whose sum is σ = 393300. Its totient is φ = 387760.

The previous prime is 390527. The next prime is 390539. The reversal of 390529 is 925093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 925093 = 13 ⋅71161.

It can be written as a sum of positive squares in 2 ways, for example, as 178929 + 211600 = 423^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 390529 - 2¹ = 390527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 390497 and 390506.

It is not an unprimeable number, because it can be changed into a prime (390527) 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, 1162 + ... + 1459.

It is an arithmetic number, because the mean of its divisors is an integer number (98325).

2³⁹⁰⁵²⁹ is an apocalyptic number.

It is an amenable number.

390529 is a deficient number, since it is larger than the sum of its proper divisors (2771).

390529 is a wasteful number, since it uses less digits than its factorization.

390529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 390529 is about 624.9231952808. The cubic root of 390529 is about 73.0944545764.

It can be divided in two parts, 390 and 529, that added together give a palindrome (919).

The spelling of 390529 in words is "three hundred ninety thousand, five hundred twenty-nine".