28438525129 has 8 divisors (see below), whose sum is σ = 32522112000. Its totient is φ = 24360173376.

The previous prime is 28438525121. The next prime is 28438525153. The reversal of 28438525129 is 92152583482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28438525129 - 2³ = 28438525121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28438525121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297129 + ... + 1318870.

It is an arithmetic number, because the mean of its divisors is an integer number (4065264000).

Almost surely, 2^28438525129 is an apocalyptic number.

It is an amenable number.

28438525129 is a deficient number, since it is larger than the sum of its proper divisors (4083586871).

28438525129 is a wasteful number, since it uses less digits than its factorization.

28438525129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617559.

The product of its digits is 1382400, while the sum is 49.

The spelling of 28438525129 in words is "twenty-eight billion, four hundred thirty-eight million, five hundred twenty-five thousand, one hundred twenty-nine".