28707663600 has 1200 divisors, whose sum is σ = 132348243456. Its totient is φ = 5785344000.

The previous prime is 28707663599. The next prime is 28707663617. The reversal of 28707663600 is 636670782.

28707663600 is a `hidden beast` number, since 2 + 8 + 7 + 0 + 7 + 6 + 636 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1200).

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 92307445 + ... + 92307755.

Almost surely, 2^28707663600 is an apocalyptic number.

28707663600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28707663600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66174121728).

28707663600 is an abundant number, since it is smaller than the sum of its proper divisors (103640579856).

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

28707663600 is a wasteful number, since it uses less digits than its factorization.

28707663600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 28707663600 in words is "twenty-eight billion, seven hundred seven million, six hundred sixty-three thousand, six hundred".