28964855808 has 168 divisors, whose sum is σ = 95625867168. Its totient is φ = 8275525632.

The previous prime is 28964855807. The next prime is 28964855839. The reversal of 28964855808 is 80855846982.

28964855808 is a `hidden beast` number, since 2 + 8 + 9 + 6 + 48 + 5 + 580 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (28964855807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 488035 + ... + 544157.

Almost surely, 2^28964855808 is an apocalyptic number.

28964855808 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 28964855808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47812933584).

28964855808 is an abundant number, since it is smaller than the sum of its proper divisors (66661011360).

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

28964855808 is an equidigital number, since it uses as much as digits as its factorization.

28964855808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56162 (or 56135 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 63.

The spelling of 28964855808 in words is "twenty-eight billion, nine hundred sixty-four million, eight hundred fifty-five thousand, eight hundred eight".