28228011520253 has 8 divisors (see below), whose sum is σ = 28308537444600. Its totient is φ = 28147488759808.

The previous prime is 28228011520229. The next prime is 28228011520309. The reversal of 28228011520253 is 35202511082282.

It can be written as a sum of positive squares in 4 ways, for example, as 5922009856324 + 22306001663929 = 2433518^2 + 4722923^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28228011520253 - 2⁴⁰ = 27128499892477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28228011520253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28228011420253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17693363 + ... + 19222671.

It is an arithmetic number, because the mean of its divisors is an integer number (3538567180575).

Almost surely, 2^{28228011520253} is an apocalyptic number.

It is an amenable number.

28228011520253 is a deficient number, since it is larger than the sum of its proper divisors (80525924347).

28228011520253 is a wasteful number, since it uses less digits than its factorization.

28228011520253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581951.

The product of its (nonzero) digits is 153600, while the sum is 41.

The spelling of 28228011520253 in words is "twenty-eight trillion, two hundred twenty-eight billion, eleven million, five hundred twenty thousand, two hundred fifty-three".