1720683216 has 240 divisors, whose sum is σ = 5945601600. Its totient is φ = 474501888.

The previous prime is 1720683163. The next prime is 1720683221. The reversal of 1720683216 is 6123860271.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 612471 + ... + 615273.

It is an arithmetic number, because the mean of its divisors is an integer number (24773340).

Almost surely, 2^1720683216 is an apocalyptic number.

1720683216 is a gapful number since it is divisible by the number (16) 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 1720683216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2972800800).

1720683216 is an abundant number, since it is smaller than the sum of its proper divisors (4224918384).

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

1720683216 is a wasteful number, since it uses less digits than its factorization.

1720683216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863 (or 2844 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1720683216 is about 41481.1187891551. The cubic root of 1720683216 is about 1198.3039038443.

The spelling of 1720683216 in words is "one billion, seven hundred twenty million, six hundred eighty-three thousand, two hundred sixteen".