2681728538 has 8 divisors (see below), whose sum is σ = 4108180032. Its totient is φ = 1312335196.

The previous prime is 2681728523. The next prime is 2681728541. The reversal of 2681728538 is 8358271862.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14264420 + ... + 14264607.

It is an arithmetic number, because the mean of its divisors is an integer number (513522504).

Almost surely, 2^2681728538 is an apocalyptic number.

2681728538 is a deficient number, since it is larger than the sum of its proper divisors (1426451494).

2681728538 is a wasteful number, since it uses less digits than its factorization.

2681728538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28529076.

The product of its digits is 1290240, while the sum is 50.

The square root of 2681728538 is about 51785.4085433339. The cubic root of 2681728538 is about 1389.3284781458.

It can be divided in two parts, 26817 and 28538, that added together give a palindrome (55355).

The spelling of 2681728538 in words is "two billion, six hundred eighty-one million, seven hundred twenty-eight thousand, five hundred thirty-eight".