28616328 has 160 divisors (see below), whose sum is σ = 89443200. Its totient is φ = 8491392.

The previous prime is 28616327. The next prime is 28616351. The reversal of 28616328 is 82361682.

28616328 is a `hidden beast` number, since 2 + 8 + 616 + 32 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 28616292 and 28616301.

It is not an unprimeable number, because it can be changed into a prime (28616327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 362193 + ... + 362271.

It is an arithmetic number, because the mean of its divisors is an integer number (559020).

Almost surely, 2^28616328 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 28616328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44721600).

28616328 is an abundant number, since it is smaller than the sum of its proper divisors (60826872).

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

28616328 is a wasteful number, since it uses less digits than its factorization.

28616328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 140 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 28616328 is about 5349.4231464710. The cubic root of 28616328 is about 305.8707643423.

The spelling of 28616328 in words is "twenty-eight million, six hundred sixteen thousand, three hundred twenty-eight".