28512354204 has 72 divisors (see below), whose sum is σ = 73171949760. Its totient is φ = 9359805312.

The previous prime is 28512354203. The next prime is 28512354319. The reversal of 28512354204 is 40245321582.

28512354204 is a `hidden beast` number, since 285 + 1 + 2 + 354 + 20 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28512354203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1116442 + ... + 1141694.

It is an arithmetic number, because the mean of its divisors is an integer number (1016277080).

Almost surely, 2^28512354204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28512354204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36585974880).

28512354204 is an abundant number, since it is smaller than the sum of its proper divisors (44659595556).

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

28512354204 is a wasteful number, since it uses less digits than its factorization.

28512354204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25739 (or 25734 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 28512354204 its reverse (40245321582), we get a palindrome (68757675786).

The spelling of 28512354204 in words is "twenty-eight billion, five hundred twelve million, three hundred fifty-four thousand, two hundred four".