273689728 has 32 divisors (see below), whose sum is σ = 587186460. Its totient is φ = 126317568.

The previous prime is 273689723. The next prime is 273689743. The reversal of 273689728 is 827986372.

It can be written as a sum of positive squares in 2 ways, for example, as 200279104 + 73410624 = 14152^2 + 8568^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (273689723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80575 + ... + 83902.

Almost surely, 2^273689728 is an apocalyptic number.

It is an amenable number.

273689728 is an abundant number, since it is smaller than the sum of its proper divisors (313496732).

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

273689728 is a wasteful number, since it uses less digits than its factorization.

273689728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164504 (or 164492 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 52.

The square root of 273689728 is about 16543.5705940405. The cubic root of 273689728 is about 649.2612735744.

The spelling of 273689728 in words is "two hundred seventy-three million, six hundred eighty-nine thousand, seven hundred twenty-eight".