2728273521 has 8 divisors (see below), whose sum is σ = 3638145024. Its totient is φ = 1818625520.

The previous prime is 2728273511. The next prime is 2728273523. The reversal of 2728273521 is 1253728272.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2728273521 - 2¹⁷ = 2728142449 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2728273521.

It is not an unprimeable number, because it can be changed into a prime (2728273523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24945 + ... + 77966.

It is an arithmetic number, because the mean of its divisors is an integer number (454768128).

Almost surely, 2^2728273521 is an apocalyptic number.

It is an amenable number.

2728273521 is a deficient number, since it is larger than the sum of its proper divisors (909871503).

2728273521 is a wasteful number, since it uses less digits than its factorization.

2728273521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111751.

The product of its digits is 94080, while the sum is 39.

The square root of 2728273521 is about 52232.8777782729. The cubic root of 2728273521 is about 1397.3203028878.

The spelling of 2728273521 in words is "two billion, seven hundred twenty-eight million, two hundred seventy-three thousand, five hundred twenty-one".