1728218072 has 16 divisors (see below), whose sum is σ = 3703324560. Its totient is φ = 740664864.

The previous prime is 1728218069. The next prime is 1728218119. The reversal of 1728218072 is 2708128271.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 15430463 + ... + 15430574.

It is an arithmetic number, because the mean of its divisors is an integer number (231457785).

Almost surely, 2^1728218072 is an apocalyptic number.

It is an amenable number.

1728218072 is an abundant number, since it is smaller than the sum of its proper divisors (1975106488).

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

1728218072 is a wasteful number, since it uses less digits than its factorization.

1728218072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30861050 (or 30861046 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 1728218072 is about 41571.8422974013. The cubic root of 1728218072 is about 1200.0504775063.

The spelling of 1728218072 in words is "one billion, seven hundred twenty-eight million, two hundred eighteen thousand, seventy-two".