1728794020 has 24 divisors (see below), whose sum is σ = 3652213824. Its totient is φ = 687375456.

The previous prime is 1728793999. The next prime is 1728794027. The reversal of 1728794020 is 204978271.

It is not an unprimeable number, because it can be changed into a prime (1728794027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255462 + ... + 262141.

It is an arithmetic number, because the mean of its divisors is an integer number (152175576).

Almost surely, 2^1728794020 is an apocalyptic number.

1728794020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1728794020 is an abundant number, since it is smaller than the sum of its proper divisors (1923419804).

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

1728794020 is a wasteful number, since it uses less digits than its factorization.

1728794020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517779 (or 517777 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 1728794020 is about 41578.7688610425. The cubic root of 1728794020 is about 1200.1837727808.

The spelling of 1728794020 in words is "one billion, seven hundred twenty-eight million, seven hundred ninety-four thousand, twenty".