128986139930 has 16 divisors (see below), whose sum is σ = 238450053960. Its totient is φ = 50200011072.

The previous prime is 128986139923. The next prime is 128986139969. The reversal of 128986139930 is 39931689821.

It can be written as a sum of positive squares in 4 ways, for example, as 125987372809 + 2998767121 = 354947^2 + 54761^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128986139930.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174305225 + ... + 174305964.

Almost surely, 2^128986139930 is an apocalyptic number.

128986139930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128986139930 is a deficient number, since it is larger than the sum of its proper divisors (109463914030).

128986139930 is a wasteful number, since it uses less digits than its factorization.

128986139930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348611233.

The product of its (nonzero) digits is 5038848, while the sum is 59.

The spelling of 128986139930 in words is "one hundred twenty-eight billion, nine hundred eighty-six million, one hundred thirty-nine thousand, nine hundred thirty".