1630216 has 32 divisors (see below), whose sum is σ = 3579840. Its totient is φ = 681408.

The previous prime is 1630199. The next prime is 1630243. The reversal of 1630216 is 6120361.

It is a junction number, because it is equal to n+sod(n) for n = 1630193 and 1630202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2070 + ... + 2746.

It is an arithmetic number, because the mean of its divisors is an integer number (111870).

2^1630216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1630216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1789920).

1630216 is an abundant number, since it is smaller than the sum of its proper divisors (1949624).

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

1630216 is a wasteful number, since it uses less digits than its factorization.

1630216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1630216 is about 1276.7991228067. The cubic root of 1630216 is about 117.6923904130.

Adding to 1630216 its reverse (6120361), we get a palindrome (7750577).

The spelling of 1630216 in words is "one million, six hundred thirty thousand, two hundred sixteen".