2728139886 has 32 divisors (see below), whose sum is σ = 6122570400. Its totient is φ = 900374400.

The previous prime is 2728139851. The next prime is 2728139891. The reversal of 2728139886 is 6889318272.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244651 + ... + 255558.

It is an arithmetic number, because the mean of its divisors is an integer number (191330325).

Almost surely, 2^2728139886 is an apocalyptic number.

2728139886 is an abundant number, since it is smaller than the sum of its proper divisors (3394430514).

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

2728139886 is a wasteful number, since it uses less digits than its factorization.

2728139886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500321 (or 500315 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 2728139886 is about 52231.5985395814. The cubic root of 2728139886 is about 1397.2974882218.

The spelling of 2728139886 in words is "two billion, seven hundred twenty-eight million, one hundred thirty-nine thousand, eight hundred eighty-six".