28350833868 has 144 divisors (see below), whose sum is σ = 86801863680. Its totient is φ = 7838739360.

The previous prime is 28350833867. The next prime is 28350833891. The reversal of 28350833868 is 86833805382.

28350833868 is a `hidden beast` number, since 28 + 3 + 508 + 33 + 86 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28350833867) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 707005 + ... + 746027.

It is an arithmetic number, because the mean of its divisors is an integer number (602790720).

Almost surely, 2^28350833868 is an apocalyptic number.

28350833868 is a gapful number since it is divisible by the number (28) 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 28350833868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43400931840).

28350833868 is an abundant number, since it is smaller than the sum of its proper divisors (58451029812).

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

28350833868 is a wasteful number, since it uses less digits than its factorization.

28350833868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39105 (or 39066 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 28350833868 in words is "twenty-eight billion, three hundred fifty million, eight hundred thirty-three thousand, eight hundred sixty-eight".