28108117415 has 48 divisors (see below), whose sum is σ = 40084936704. Its totient is φ = 18515952000.

The previous prime is 28108117369. The next prime is 28108117439. The reversal of 28108117415 is 51471180182.

It is a happy number.

It is not a de Polignac number, because 28108117415 - 2⁶ = 28108117351 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 47 ways as a sum of consecutive naturals, for example, 26743640 + ... + 26744690.

It is an arithmetic number, because the mean of its divisors is an integer number (835102848).

Almost surely, 2^28108117415 is an apocalyptic number.

28108117415 is a deficient number, since it is larger than the sum of its proper divisors (11976819289).

28108117415 is a wasteful number, since it uses less digits than its factorization.

28108117415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408 (or 1251 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 38.

Adding to 28108117415 its reverse (51471180182), we get a palindrome (79579297597).

The spelling of 28108117415 in words is "twenty-eight billion, one hundred eight million, one hundred seventeen thousand, four hundred fifteen".