28149584338 has 16 divisors (see below), whose sum is σ = 43790451480. Its totient is φ = 13555213056.

The previous prime is 28149584329. The next prime is 28149584357. The reversal of 28149584338 is 83348594182.

It can be written as a sum of positive squares in 4 ways, for example, as 23924974329 + 4224610009 = 154677^2 + 64997^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588231 + ... + 634282.

Almost surely, 2^28149584338 is an apocalyptic number.

28149584338 is a deficient number, since it is larger than the sum of its proper divisors (15640867142).

28149584338 is a wasteful number, since it uses less digits than its factorization.

28149584338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222941.

The product of its digits is 6635520, while the sum is 55.

The spelling of 28149584338 in words is "twenty-eight billion, one hundred forty-nine million, five hundred eighty-four thousand, three hundred thirty-eight".