28915066387 has 8 divisors (see below), whose sum is σ = 29851960320. Its totient is φ = 27978431880.

The previous prime is 28915066379. The next prime is 28915066391. The reversal of 28915066387 is 78366051982.

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

It is a cyclic number.

It is not a de Polignac number, because 28915066387 - 2³ = 28915066379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28915060387) 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, 175914 + ... + 297952.

It is an arithmetic number, because the mean of its divisors is an integer number (3731495040).

Almost surely, 2^28915066387 is an apocalyptic number.

28915066387 is a deficient number, since it is larger than the sum of its proper divisors (936893933).

28915066387 is a wasteful number, since it uses less digits than its factorization.

28915066387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129713.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 28915066387 in words is "twenty-eight billion, nine hundred fifteen million, sixty-six thousand, three hundred eighty-seven".