1728729042 has 32 divisors (see below), whose sum is σ = 3512834304. Its totient is φ = 567032400.

The previous prime is 1728729019. The next prime is 1728729047. The reversal of 1728729042 is 2409278271.

1728729042 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1728728985 and 1728729003.

It is not an unprimeable number, because it can be changed into a prime (1728729047) 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, 517317 + ... + 520647.

It is an arithmetic number, because the mean of its divisors is an integer number (109776072).

Almost surely, 2^1728729042 is an apocalyptic number.

1728729042 is an abundant number, since it is smaller than the sum of its proper divisors (1784105262).

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

1728729042 is a wasteful number, since it uses less digits than its factorization.

1728729042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4694.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 1728729042 is about 41577.9874693329. The cubic root of 1728729042 is about 1200.1687359946.

The spelling of 1728729042 in words is "one billion, seven hundred twenty-eight million, seven hundred twenty-nine thousand, forty-two".