1716821340 has 96 divisors (see below), whose sum is σ = 5198926656. Its totient is φ = 420802560.

The previous prime is 1716821287. The next prime is 1716821377. The reversal of 1716821340 is 431286171.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183414 + ... + 192546.

It is an arithmetic number, because the mean of its divisors is an integer number (54155486).

Almost surely, 2^1716821340 is an apocalyptic number.

1716821340 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 1716821340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2599463328).

1716821340 is an abundant number, since it is smaller than the sum of its proper divisors (3482105316).

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

1716821340 is a wasteful number, since it uses less digits than its factorization.

1716821340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9399 (or 9397 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 1716821340 is about 41434.5428356583. The cubic root of 1716821340 is about 1197.4067471254.

The spelling of 1716821340 in words is "one billion, seven hundred sixteen million, eight hundred twenty-one thousand, three hundred forty".