1720630512 has 120 divisors (see below), whose sum is σ = 5021786224. Its totient is φ = 570322944.

The previous prime is 1720630489. The next prime is 1720630589. The reversal of 1720630512 is 2150360271.

It is a happy number.

1720630512 is a `hidden beast` number, since 1 + 7 + 20 + 630 + 5 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 749238 + ... + 751530.

Almost surely, 2^1720630512 is an apocalyptic number.

1720630512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1720630512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2510893112).

1720630512 is an abundant number, since it is smaller than the sum of its proper divisors (3301155712).

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

1720630512 is a wasteful number, since it uses less digits than its factorization.

1720630512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509 (or 2491 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1720630512 is about 41480.4835073074. The cubic root of 1720630512 is about 1198.2916691589.

Adding to 1720630512 its reverse (2150360271), we get a palindrome (3870990783).

The spelling of 1720630512 in words is "one billion, seven hundred twenty million, six hundred thirty thousand, five hundred twelve".