28329758208 has 160 divisors (see below), whose sum is σ = 86564459520. Its totient is φ = 9138493440.

The previous prime is 28329758207. The next prime is 28329758263. The reversal of 28329758208 is 80285792382.

It is a happy number.

28329758208 is a `hidden beast` number, since 28 + 32 + 9 + 7 + 582 + 0 + 8 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28329758203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395491 + ... + 461597.

It is an arithmetic number, because the mean of its divisors is an integer number (541027872).

Almost surely, 2^28329758208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28329758208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43282229760).

28329758208 is an abundant number, since it is smaller than the sum of its proper divisors (58234701312).

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

28329758208 is an equidigital number, since it uses as much as digits as its factorization.

28329758208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66165 (or 66143 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 28329758208 in words is "twenty-eight billion, three hundred twenty-nine million, seven hundred fifty-eight thousand, two hundred eight".