1728236020 has 24 divisors (see below), whose sum is σ = 4147766784. Its totient is φ = 592538016.

The previous prime is 1728236017. The next prime is 1728236021. The reversal of 1728236020 is 206328271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728236021) 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, 6172132 + ... + 6172411.

It is an arithmetic number, because the mean of its divisors is an integer number (172823616).

Almost surely, 2^1728236020 is an apocalyptic number.

1728236020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1728236020 is an abundant number, since it is smaller than the sum of its proper divisors (2419530764).

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

1728236020 is a wasteful number, since it uses less digits than its factorization.

1728236020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12344559 (or 12344557 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1728236020 is about 41572.0581641083. The cubic root of 1728236020 is about 1200.0546317720.

The spelling of 1728236020 in words is "one billion, seven hundred twenty-eight million, two hundred thirty-six thousand, twenty".