28715052708 has 18 divisors (see below), whose sum is σ = 72585272214. Its totient is φ = 9571684224.

The previous prime is 28715052703. The next prime is 28715052721. The reversal of 28715052708 is 80725051782.

28715052708 is a `hidden beast` number, since 2 + 8 + 71 + 50 + 527 + 0 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23467788864 + 5247263844 = 153192^2 + 72438^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (28715052701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 398820141 + ... + 398820212.

It is an arithmetic number, because the mean of its divisors is an integer number (4032515123).

Almost surely, 2^28715052708 is an apocalyptic number.

It is an amenable number.

28715052708 is an abundant number, since it is smaller than the sum of its proper divisors (43870219506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28715052708 is a wasteful number, since it uses less digits than its factorization.

28715052708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797640363 (or 797640358 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The spelling of 28715052708 in words is "twenty-eight billion, seven hundred fifteen million, fifty-two thousand, seven hundred eight".