390216 has 32 divisors (see below), whose sum is σ = 993600. Its totient is φ = 127680.

The previous prime is 390211. The next prime is 390223. The reversal of 390216 is 612093.

It is a junction number, because it is equal to n+sod(n) for n = 390192 and 390201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390211) by changing a digit.

390216 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, 1590 + ... + 1818.

It is an arithmetic number, because the mean of its divisors is an integer number (31050).

2³⁹⁰²¹⁶ is an apocalyptic number.

It is an amenable number.

390216 is an abundant number, since it is smaller than the sum of its proper divisors (603384).

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

390216 is a wasteful number, since it uses less digits than its factorization.

390216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 390216 is about 624.6727143073. The cubic root of 390216 is about 73.0749215163.

It can be divided in two parts, 390 and 216, that added together give a palindrome (606).

The spelling of 390216 in words is "three hundred ninety thousand, two hundred sixteen".