28712425680 has 120 divisors (see below), whose sum is σ = 99536486400. Its totient is φ = 7409652480.

The previous prime is 28712425673. The next prime is 28712425699. The reversal of 28712425680 is 8652421782.

28712425680 is a `hidden beast` number, since 2 + 87 + 1 + 2 + 4 + 2 + 568 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 620880 + ... + 665519.

It is an arithmetic number, because the mean of its divisors is an integer number (829470720).

Almost surely, 2^28712425680 is an apocalyptic number.

28712425680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28712425680 is an abundant number, since it is smaller than the sum of its proper divisors (70824060720).

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

28712425680 is a wasteful number, since it uses less digits than its factorization.

28712425680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286449 (or 1286440 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 28712425680 in words is "twenty-eight billion, seven hundred twelve million, four hundred twenty-five thousand, six hundred eighty".