28725471312 has 20 divisors (see below), whose sum is σ = 74207467680. Its totient is φ = 9575157088.

The previous prime is 28725471289. The next prime is 28725471337. The reversal of 28725471312 is 21317452782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299223612 + ... + 299223707.

It is an arithmetic number, because the mean of its divisors is an integer number (3710373384).

Almost surely, 2^28725471312 is an apocalyptic number.

It is an amenable number.

28725471312 is an abundant number, since it is smaller than the sum of its proper divisors (45481996368).

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

28725471312 is a wasteful number, since it uses less digits than its factorization.

28725471312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598447330 (or 598447324 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The spelling of 28725471312 in words is "twenty-eight billion, seven hundred twenty-five million, four hundred seventy-one thousand, three hundred twelve".