28029797738 has 8 divisors (see below), whose sum is σ = 42169459332. Its totient is φ = 13973311296.

The previous prime is 28029797707. The next prime is 28029797743. The reversal of 28029797738 is 83779792082.

It can be written as a sum of positive squares in 2 ways, for example, as 25815812929 + 2213984809 = 160673^2 + 47053^2 .

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

It is a super-2 number, since 2×28029797738² (a number of 22 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 20792945 + ... + 20794292.

Almost surely, 2^28029797738 is an apocalyptic number.

28029797738 is a deficient number, since it is larger than the sum of its proper divisors (14139661594).

28029797738 is a wasteful number, since it uses less digits than its factorization.

28029797738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41587576.

The product of its (nonzero) digits is 21337344, while the sum is 62.

The spelling of 28029797738 in words is "twenty-eight billion, twenty-nine million, seven hundred ninety-seven thousand, seven hundred thirty-eight".