28863223252 has 24 divisors (see below), whose sum is σ = 50748201000. Its totient is φ = 14363897856.

The previous prime is 28863223243. The next prime is 28863223253. The reversal of 28863223252 is 25232236882.

It can be written as a sum of positive squares in 4 ways, for example, as 19747556676 + 9115666576 = 140526^2 + 95476^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28863223199 and 28863223208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28863223253) 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, 714918 + ... + 754210.

It is an arithmetic number, because the mean of its divisors is an integer number (2114508375).

Almost surely, 2^28863223252 is an apocalyptic number.

It is an amenable number.

28863223252 is a deficient number, since it is larger than the sum of its proper divisors (21884977748).

28863223252 is a wasteful number, since it uses less digits than its factorization.

28863223252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40155 (or 40153 counting only the distinct ones).

The product of its digits is 552960, while the sum is 43.

The spelling of 28863223252 in words is "twenty-eight billion, eight hundred sixty-three million, two hundred twenty-three thousand, two hundred fifty-two".