390620 has 12 divisors (see below), whose sum is σ = 820344. Its totient is φ = 156240.

The previous prime is 390581. The next prime is 390647. The reversal of 390620 is 26093.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 19531 = 390620 / (3 + 9 + 0 + 6 + 2 + 0).

It is a nialpdrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 390592 and 390601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9746 + ... + 9785.

It is an arithmetic number, because the mean of its divisors is an integer number (68362).

2³⁹⁰⁶²⁰ is an apocalyptic number.

It is an amenable number.

390620 is an abundant number, since it is smaller than the sum of its proper divisors (429724).

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

390620 is a wasteful number, since it uses less digits than its factorization.

390620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19540 (or 19538 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 390620 is about 624.9959999872. The cubic root of 390620 is about 73.1001315588.

The spelling of 390620 in words is "three hundred ninety thousand, six hundred twenty".