28524747725 has 6 divisors (see below), whose sum is σ = 35370687210. Its totient is φ = 22819798160.

The previous prime is 28524747721. The next prime is 28524747731. The reversal of 28524747725 is 52774742582.

It can be written as a sum of positive squares in 3 ways, for example, as 2621132809 + 25903614916 = 51197^2 + 160946^2 .

It is not a de Polignac number, because 28524747725 - 2² = 28524747721 is a prime.

It is a super-2 number, since 2×28524747725² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28524747721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 570494930 + ... + 570494979.

It is an arithmetic number, because the mean of its divisors is an integer number (5895114535).

Almost surely, 2^28524747725 is an apocalyptic number.

28524747725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28524747725 is a deficient number, since it is larger than the sum of its proper divisors (6845939485).

28524747725 is a wasteful number, since it uses less digits than its factorization.

28524747725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140989919 (or 1140989914 counting only the distinct ones).

The product of its digits is 8780800, while the sum is 53.

The spelling of 28524747725 in words is "twenty-eight billion, five hundred twenty-four million, seven hundred forty-seven thousand, seven hundred twenty-five".