2728812281 has 16 divisors (see below), whose sum is σ = 3100688640. Its totient is φ = 2380700160.

The previous prime is 2728812211. The next prime is 2728812287. The reversal of 2728812281 is 1822188272.

It is a cyclic number.

It is not a de Polignac number, because 2728812281 - 2²⁶ = 2661703417 is a prime.

It is a super-2 number, since 2×2728812281² = 14892832929872845922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2728812287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93641 + ... + 119273.

It is an arithmetic number, because the mean of its divisors is an integer number (193793040).

Almost surely, 2^2728812281 is an apocalyptic number.

It is an amenable number.

2728812281 is a deficient number, since it is larger than the sum of its proper divisors (371876359).

2728812281 is a wasteful number, since it uses less digits than its factorization.

2728812281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26096.

The product of its digits is 57344, while the sum is 41.

The square root of 2728812281 is about 52238.0348118112. The cubic root of 2728812281 is about 1397.4122744506.

The spelling of 2728812281 in words is "two billion, seven hundred twenty-eight million, eight hundred twelve thousand, two hundred eighty-one".