28642718139 has 16 divisors (see below), whose sum is σ = 45943207680. Its totient is φ = 15505832160.

The previous prime is 28642718131. The next prime is 28642718147. The reversal of 28642718139 is 93181724682.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28642718131) and next prime (28642718147).

It is not a de Polignac number, because 28642718139 - 2³ = 28642718131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28642718091 and 28642718100.

It is not an unprimeable number, because it can be changed into a prime (28642718131) 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, 35892732 + ... + 35893529.

It is an arithmetic number, because the mean of its divisors is an integer number (2871450480).

Almost surely, 2^28642718139 is an apocalyptic number.

28642718139 is a deficient number, since it is larger than the sum of its proper divisors (17300489541).

28642718139 is a wasteful number, since it uses less digits than its factorization.

28642718139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71786290.

The product of its digits is 1161216, while the sum is 51.

The spelling of 28642718139 in words is "twenty-eight billion, six hundred forty-two million, seven hundred eighteen thousand, one hundred thirty-nine".