139028679826 has 16 divisors (see below), whose sum is σ = 208711405080. Its totient is φ = 69458238720.

The previous prime is 139028679821. The next prime is 139028679827. The reversal of 139028679826 is 628976820931.

It can be written as a sum of positive squares in 4 ways, for example, as 129783665025 + 9245014801 = 360255^2 + 96151^2 .

It is not an unprimeable number, because it can be changed into a prime (139028679821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19553160 + ... + 19560268.

Almost surely, 2^139028679826 is an apocalyptic number.

139028679826 is a deficient number, since it is larger than the sum of its proper divisors (69682725254).

139028679826 is a wasteful number, since it uses less digits than its factorization.

139028679826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13629.

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 139028679826 in words is "one hundred thirty-nine billion, twenty-eight million, six hundred seventy-nine thousand, eight hundred twenty-six".