28628171730 has 96 divisors (see below), whose sum is σ = 75215649600. Its totient is φ = 7554301056.

The previous prime is 28628171687. The next prime is 28628171779. The reversal of 28628171730 is 3717182682.

28628171730 is a `hidden beast` number, since 2 + 8 + 628 + 1 + 7 + 17 + 3 + 0 = 666.

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

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, 3962061 + ... + 3969279.

It is an arithmetic number, because the mean of its divisors is an integer number (783496350).

Almost surely, 2^28628171730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28628171730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37607824800).

28628171730 is an abundant number, since it is smaller than the sum of its proper divisors (46587477870).

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

28628171730 is a wasteful number, since it uses less digits than its factorization.

28628171730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7688 (or 7685 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 28628171730 in words is "twenty-eight billion, six hundred twenty-eight million, one hundred seventy-one thousand, seven hundred thirty".