28228011520252 has 24 divisors (see below), whose sum is σ = 49417726092336. Its totient is φ = 14108662096128.

The previous prime is 28228011520229. The next prime is 28228011520309. The reversal of 28228011520252 is 25202511082282.

It is a super-2 number, since 2×28228011520252² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134704068 + ... + 134913460.

It is an arithmetic number, because the mean of its divisors is an integer number (2059071920514).

Almost surely, 2^{28228011520252} is an apocalyptic number.

It is an amenable number.

28228011520252 is a deficient number, since it is larger than the sum of its proper divisors (21189714572084).

28228011520252 is a wasteful number, since it uses less digits than its factorization.

28228011520252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221997 (or 221995 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 40.

The spelling of 28228011520252 in words is "twenty-eight trillion, two hundred twenty-eight billion, eleven million, five hundred twenty thousand, two hundred fifty-two".