1728868977 has 48 divisors (see below), whose sum is σ = 2820819456. Its totient is φ = 1010880000.

The previous prime is 1728868949. The next prime is 1728868987. The reversal of 1728868977 is 7798688271.

It is not a de Polignac number, because 1728868977 - 2⁸ = 1728868721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1728868937) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1328227 + ... + 1329527.

It is an arithmetic number, because the mean of its divisors is an integer number (58767072).

Almost surely, 2^1728868977 is an apocalyptic number.

It is an amenable number.

1728868977 is a deficient number, since it is larger than the sum of its proper divisors (1091950479).

1728868977 is a wasteful number, since it uses less digits than its factorization.

1728868977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782 (or 1779 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 63.

The square root of 1728868977 is about 41579.6702367876. The cubic root of 1728868977 is about 1200.2011183743.

The spelling of 1728868977 in words is "one billion, seven hundred twenty-eight million, eight hundred sixty-eight thousand, nine hundred seventy-seven".