28528936228325 has 12 divisors (see below), whose sum is σ = 38097102533028. Its totient is φ = 21067522137600.

The previous prime is 28528936228297. The next prime is 28528936228427. The reversal of 28528936228325 is 52382263982582.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 7056296264161 + 21472639964164 = 2656369^2 + 4633858^2 .

It is not a de Polignac number, because 28528936228325 - 2⁸ = 28528936228069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43890670796 + ... + 43890671445.

It is an arithmetic number, because the mean of its divisors is an integer number (3174758544419).

Almost surely, 2^{28528936228325} is an apocalyptic number.

28528936228325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28528936228325 is a deficient number, since it is larger than the sum of its proper divisors (9568166304703).

28528936228325 is a wasteful number, since it uses less digits than its factorization.

28528936228325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87781342264 (or 87781342259 counting only the distinct ones).

The product of its digits is 199065600, while the sum is 65.

The spelling of 28528936228325 in words is "twenty-eight trillion, five hundred twenty-eight billion, nine hundred thirty-six million, two hundred twenty-eight thousand, three hundred twenty-five".