28025248521 has 8 divisors (see below), whose sum is σ = 37369445184. Its totient is φ = 18682275440.

The previous prime is 28025248519. The next prime is 28025248547. The reversal of 28025248521 is 12584252082.

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 28025248521 - 2¹ = 28025248519 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28025248521.

It is not an unprimeable number, because it can be changed into a prime (28025248721) 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, 251046 + ... + 345071.

It is an arithmetic number, because the mean of its divisors is an integer number (4671180648).

Almost surely, 2^28025248521 is an apocalyptic number.

It is an amenable number.

28025248521 is a deficient number, since it is larger than the sum of its proper divisors (9344196663).

28025248521 is a wasteful number, since it uses less digits than its factorization.

28025248521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611791.

The product of its (nonzero) digits is 102400, while the sum is 39.

The spelling of 28025248521 in words is "twenty-eight billion, twenty-five million, two hundred forty-eight thousand, five hundred twenty-one".