28272608 has 144 divisors (see below), whose sum is σ = 74405520. Its totient is φ = 10450944.

The previous prime is 28272583. The next prime is 28272641. The reversal of 28272608 is 80627282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387260 + ... + 387332.

It is an arithmetic number, because the mean of its divisors is an integer number (516705).

Almost surely, 2^28272608 is an apocalyptic number.

28272608 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 28272608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37202760).

28272608 is an abundant number, since it is smaller than the sum of its proper divisors (46132912).

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

28272608 is a wasteful number, since it uses less digits than its factorization.

28272608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 28272608 is about 5317.1992627698. The cubic root of 28272608 is about 304.6411905230.

The spelling of 28272608 in words is "twenty-eight million, two hundred seventy-two thousand, six hundred eight".