1630206 has 40 divisors (see below), whose sum is σ = 3789720. Its totient is φ = 523152.

The previous prime is 1630199. The next prime is 1630243. The reversal of 1630206 is 6020361.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4525 + ... + 4871.

It is an arithmetic number, because the mean of its divisors is an integer number (94743).

2^1630206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1630206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1894860).

1630206 is an abundant number, since it is smaller than the sum of its proper divisors (2159514).

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

1630206 is a wasteful number, since it uses less digits than its factorization.

1630206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1630206 is about 1276.7952067579. The cubic root of 1630206 is about 117.6921497647.

Adding to 1630206 its reverse (6020361), we get a palindrome (7650567).

The spelling of 1630206 in words is "one million, six hundred thirty thousand, two hundred six".