28076328 has 128 divisors (see below), whose sum is σ = 92160000. Its totient is φ = 7750080.

The previous prime is 28076317. The next prime is 28076341. The reversal of 28076328 is 82367082.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 28076292 and 28076301.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 46573 + ... + 47171.

It is an arithmetic number, because the mean of its divisors is an integer number (720000).

Almost surely, 2^28076328 is an apocalyptic number.

28076328 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 28076328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46080000).

28076328 is an abundant number, since it is smaller than the sum of its proper divisors (64083672).

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

28076328 is a wasteful number, since it uses less digits than its factorization.

28076328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28076328 is about 5298.7100316964. The cubic root of 28076328 is about 303.9345715609.

The spelling of 28076328 in words is "twenty-eight million, seventy-six thousand, three hundred twenty-eight".