28028863929508 has 48 divisors (see below), whose sum is σ = 53830308608496. Its totient is φ = 12689955532800.

The previous prime is 28028863929499. The next prime is 28028863929511. The reversal of 28028863929508 is 80592936882082.

It can be written as a sum of positive squares in 8 ways, for example, as 499554931264 + 27529308998244 = 706792^2 + 5246838^2 .

It is a super-3 number, since 3×28028863929508³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13920208 + ... + 15806008.

It is an arithmetic number, because the mean of its divisors is an integer number (1121464762677).

Almost surely, 2^{28028863929508} is an apocalyptic number.

It is an amenable number.

28028863929508 is a deficient number, since it is larger than the sum of its proper divisors (25801444678988).

28028863929508 is a wasteful number, since it uses less digits than its factorization.

28028863929508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891264 (or 1891262 counting only the distinct ones).

The product of its (nonzero) digits is 238878720, while the sum is 70.

The spelling of 28028863929508 in words is "twenty-eight trillion, twenty-eight billion, eight hundred sixty-three million, nine hundred twenty-nine thousand, five hundred eight".