272728643 has 4 divisors (see below), whose sum is σ = 297522168. Its totient is φ = 247935120.

The previous prime is 272728627. The next prime is 272728649. The reversal of 272728643 is 346827272.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 272728643 - 2⁴ = 272728627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 272728643.

It is not an unprimeable number, because it can be changed into a prime (272728649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12396746 + ... + 12396767.

It is an arithmetic number, because the mean of its divisors is an integer number (74380542).

Almost surely, 2^272728643 is an apocalyptic number.

272728643 is a deficient number, since it is larger than the sum of its proper divisors (24793525).

272728643 is a wasteful number, since it uses less digits than its factorization.

272728643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24793524.

The product of its digits is 225792, while the sum is 41.

The square root of 272728643 is about 16514.4979639104. The cubic root of 272728643 is about 648.5004033385.

The spelling of 272728643 in words is "two hundred seventy-two million, seven hundred twenty-eight thousand, six hundred forty-three".