1728915012 has 72 divisors (see below), whose sum is σ = 4921443072. Its totient is φ = 507009600.

The previous prime is 1728914987. The next prime is 1728915031. The reversal of 1728915012 is 2105198271.

It is a happy number.

1728915012 is a `hidden beast` number, since 1 + 72 + 89 + 1 + 501 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 58143 + ... + 82694.

It is an arithmetic number, because the mean of its divisors is an integer number (68353376).

Almost surely, 2^1728915012 is an apocalyptic number.

1728915012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1728915012 is an abundant number, since it is smaller than the sum of its proper divisors (3192528060).

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

1728915012 is a wasteful number, since it uses less digits than its factorization.

1728915012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140889 (or 140884 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 1728915012 is about 41580.2238089215. The cubic root of 1728915012 is about 1200.2117709587.

The spelling of 1728915012 in words is "one billion, seven hundred twenty-eight million, nine hundred fifteen thousand, twelve".