28508952308157 has 12 divisors (see below), whose sum is σ = 41268924460764. Its totient is φ = 18964740505920.

The previous prime is 28508952308153. The next prime is 28508952308167. The reversal of 28508952308157 is 75180325980582.

28508952308157 is a `hidden beast` number, since 2 + 8 + 50 + 8 + 9 + 523 + 0 + 8 + 1 + 57 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10861467114276 + 17647485193881 = 3295674^2 + 4200891^2 .

It is not a de Polignac number, because 28508952308157 - 2² = 28508952308153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28508952308094 and 28508952308103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28508952308153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3435637248 + ... + 3435645545.

It is an arithmetic number, because the mean of its divisors is an integer number (3439077038397).

Almost surely, 2^{28508952308157} is an apocalyptic number.

It is an amenable number.

28508952308157 is a deficient number, since it is larger than the sum of its proper divisors (12759972152607).

28508952308157 is a wasteful number, since it uses less digits than its factorization.

28508952308157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6871283260 (or 6871283257 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 63.

The spelling of 28508952308157 in words is "twenty-eight trillion, five hundred eight billion, nine hundred fifty-two million, three hundred eight thousand, one hundred fifty-seven".