1729721484 has 18 divisors (see below), whose sum is σ = 4372351620. Its totient is φ = 576573816.

The previous prime is 1729721471. The next prime is 1729721527. The reversal of 1729721484 is 4841279271.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1729721484² = 5983872824422324512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24023874 + ... + 24023945.

Almost surely, 2^1729721484 is an apocalyptic number.

It is an amenable number.

1729721484 is an abundant number, since it is smaller than the sum of its proper divisors (2642630136).

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

1729721484 is a wasteful number, since it uses less digits than its factorization.

1729721484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48047829 (or 48047824 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 1729721484 is about 41589.9204615734. The cubic root of 1729721484 is about 1200.3983594102.

It can be divided in two parts, 17297 and 21484, that added together give a triangular number (38781 = T₂₇₈).

The spelling of 1729721484 in words is "one billion, seven hundred twenty-nine million, seven hundred twenty-one thousand, four hundred eighty-four".