2628728279 has 4 divisors (see below), whose sum is σ = 2631692784. Its totient is φ = 2625763776.

The previous prime is 2628728273. The next prime is 2628728281. The reversal of 2628728279 is 9728278262.

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 2628728279 - 2⁸ = 2628728023 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 2628728279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2628728273) 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, 1480922 + ... + 1482695.

It is an arithmetic number, because the mean of its divisors is an integer number (657923196).

Almost surely, 2^2628728279 is an apocalyptic number.

2628728279 is a deficient number, since it is larger than the sum of its proper divisors (2964505).

2628728279 is an equidigital number, since it uses as much as digits as its factorization.

2628728279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964504.

The product of its digits is 2709504, while the sum is 53.

The square root of 2628728279 is about 51271.1251973272. The cubic root of 2628728279 is about 1380.1148610900.

The spelling of 2628728279 in words is "two billion, six hundred twenty-eight million, seven hundred twenty-eight thousand, two hundred seventy-nine".