28000280028 has 48 divisors (see below), whose sum is σ = 74798307584. Its totient is φ = 7986055680.

The previous prime is 28000279999. The next prime is 28000280051. The reversal of 28000280028 is 82008200082.

It is a super-3 number, since 3×28000280028³ (a number of 32 digits) contains 333 as substring.

28000280028 is a modest number, since divided by 280028 gives 280 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 28000279977 and 28000280004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243925 + ... + 339852.

Almost surely, 2^28000280028 is an apocalyptic number.

28000280028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28000280028 is an abundant number, since it is smaller than the sum of its proper divisors (46798027556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28000280028 is a wasteful number, since it uses less digits than its factorization.

28000280028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584362 (or 584360 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The spelling of 28000280028 in words is "twenty-eight billion, two hundred eighty thousand, twenty-eight".