28079688 has 192 divisors, whose sum is σ = 92759040. Its totient is φ = 6918912.

The previous prime is 28079687. The next prime is 28079713. The reversal of 28079688 is 88697082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28079683) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 652995 + ... + 653037.

It is an arithmetic number, because the mean of its divisors is an integer number (483120).

Almost surely, 2^28079688 is an apocalyptic number.

28079688 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 28079688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46379520).

28079688 is an abundant number, since it is smaller than the sum of its proper divisors (64679352).

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

28079688 is a wasteful number, since it uses less digits than its factorization.

28079688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 28079688 is about 5299.0270805120. The cubic root of 28079688 is about 303.9466954092.

The spelling of 28079688 in words is "twenty-eight million, seventy-nine thousand, six hundred eighty-eight".