28933309608 has 128 divisors (see below), whose sum is σ = 85455544320. Its totient is φ = 7988532480.

The previous prime is 28933309597. The next prime is 28933309637. The reversal of 28933309608 is 80690333982.

It is a super-2 number, since 2×28933309608² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4022191 + ... + 4029377.

It is an arithmetic number, because the mean of its divisors is an integer number (667621440).

Almost surely, 2^28933309608 is an apocalyptic number.

28933309608 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 28933309608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42727772160).

28933309608 is an abundant number, since it is smaller than the sum of its proper divisors (56522234712).

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

28933309608 is a wasteful number, since it uses less digits than its factorization.

28933309608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8007 (or 8003 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 28933309608 in words is "twenty-eight billion, nine hundred thirty-three million, three hundred nine thousand, six hundred eight".