28748581525 has 12 divisors (see below), whose sum is σ = 35665386912. Its totient is φ = 22987803440.

The previous prime is 28748581489. The next prime is 28748581531. The reversal of 28748581525 is 52518584782.

It is not a de Polignac number, because 28748581525 - 2¹¹ = 28748579477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223327 + ... + 327676.

It is an arithmetic number, because the mean of its divisors is an integer number (2972115576).

Almost surely, 2^28748581525 is an apocalyptic number.

28748581525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28748581525 is a deficient number, since it is larger than the sum of its proper divisors (6916805387).

28748581525 is a wasteful number, since it uses less digits than its factorization.

28748581525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553100 (or 553095 counting only the distinct ones).

The product of its digits is 7168000, while the sum is 55.

The spelling of 28748581525 in words is "twenty-eight billion, seven hundred forty-eight million, five hundred eighty-one thousand, five hundred twenty-five".