390220 has 24 divisors (see below), whose sum is σ = 831600. Its totient is φ = 153792.

The previous prime is 390211. The next prime is 390223. The reversal of 390220 is 22093.

390220 = T₂₄₉ + T₂₅₀ + ... + T₂₆₀.

It is a junction number, because it is equal to n+sod(n) for n = 390194 and 390203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390223) by changing a digit.

390220 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 in 7 ways as a sum of consecutive naturals, for example, 2091 + ... + 2269.

It is an arithmetic number, because the mean of its divisors is an integer number (34650).

2³⁹⁰²²⁰ is an apocalyptic number.

It is an amenable number.

390220 is an abundant number, since it is smaller than the sum of its proper divisors (441380).

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

390220 is a wasteful number, since it uses less digits than its factorization.

390220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 390220 is about 624.6759159756. The cubic root of 390220 is about 73.0751712060.

The spelling of 390220 in words is "three hundred ninety thousand, two hundred twenty".