1721382912 has 144 divisors (see below), whose sum is σ = 5056473240. Its totient is φ = 564019200.

The previous prime is 1721382863. The next prime is 1721382959. The reversal of 1721382912 is 2192831271.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1123587 + ... + 1125117.

Almost surely, 2^1721382912 is an apocalyptic number.

1721382912 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 1721382912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2528236620).

1721382912 is an abundant number, since it is smaller than the sum of its proper divisors (3335090328).

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

1721382912 is a wasteful number, since it uses less digits than its factorization.

1721382912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620 (or 1597 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1721382912 is about 41489.5518413974. The cubic root of 1721382912 is about 1198.4663073241.

The spelling of 1721382912 in words is "one billion, seven hundred twenty-one million, three hundred eighty-two thousand, nine hundred twelve".