1721716480 has 144 divisors (see below), whose sum is σ = 4764269664. Its totient is φ = 589168640.

The previous prime is 1721716427. The next prime is 1721716489. The reversal of 1721716480 is 846171271.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721716489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235764 + ... + 242956.

It is an arithmetic number, because the mean of its divisors is an integer number (33085206).

Almost surely, 2^1721716480 is an apocalyptic number.

1721716480 is a gapful number since it is divisible by the number (10) 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 1721716480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2382134832).

1721716480 is an abundant number, since it is smaller than the sum of its proper divisors (3042553184).

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

1721716480 is a wasteful number, since it uses less digits than its factorization.

1721716480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242 (or 7228 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 1721716480 is about 41493.5715503016. The cubic root of 1721716480 is about 1198.5437148911.

It can be divided in two parts, 1721 and 716480, that added together give a triangular number (718201 = T₁₁₉₈).

The spelling of 1721716480 in words is "one billion, seven hundred twenty-one million, seven hundred sixteen thousand, four hundred eighty".