1630220 has 24 divisors (see below), whose sum is σ = 3517584. Its totient is φ = 634176.

The previous prime is 1630199. The next prime is 1630243. The reversal of 1630220 is 220361.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1630195 and 1630204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362 + ... + 1841.

It is an arithmetic number, because the mean of its divisors is an integer number (146566).

2^1630220 is an apocalyptic number.

1630220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1630220 is an abundant number, since it is smaller than the sum of its proper divisors (1887364).

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

1630220 is a wasteful number, since it uses less digits than its factorization.

1630220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2249 (or 2247 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1630220 is about 1276.8006892229. The cubic root of 1630220 is about 117.6924866721.

Adding to 1630220 its reverse (220361), we get a palindrome (1850581).

The spelling of 1630220 in words is "one million, six hundred thirty thousand, two hundred twenty".