1729004720 has 80 divisors (see below), whose sum is σ = 4271914080. Its totient is φ = 648548352.

The previous prime is 1729004707. The next prime is 1729004729. The reversal of 1729004720 is 274009271.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1729004729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396311 + ... + 400649.

It is an arithmetic number, because the mean of its divisors is an integer number (53398926).

Almost surely, 2^1729004720 is an apocalyptic number.

1729004720 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 1729004720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2135957040).

1729004720 is an abundant number, since it is smaller than the sum of its proper divisors (2542909360).

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

1729004720 is a wasteful number, since it uses less digits than its factorization.

1729004720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662 (or 4656 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 1729004720 is about 41581.3025289011. The cubic root of 1729004720 is about 1200.2325290130.

The spelling of 1729004720 in words is "one billion, seven hundred twenty-nine million, four thousand, seven hundred twenty".