390020 has 12 divisors (see below), whose sum is σ = 819084. Its totient is φ = 156000.

The previous prime is 390001. The next prime is 390043. The reversal of 390020 is 20093.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 174724 + 215296 = 418^2 + 464^2 .

It is a junction number, because it is equal to n+sod(n) for n = 389977 and 390004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9731 + ... + 9770.

It is an arithmetic number, because the mean of its divisors is an integer number (68257).

2³⁹⁰⁰²⁰ is an apocalyptic number.

It is an amenable number.

390020 is an abundant number, since it is smaller than the sum of its proper divisors (429064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390020 is a wasteful number, since it uses less digits than its factorization.

390020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19510 (or 19508 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 390020 is about 624.5158124499. The cubic root of 390020 is about 73.0626846327.

The spelling of 390020 in words is "three hundred ninety thousand, twenty".