28646028 has 24 divisors (see below), whose sum is σ = 74267760. Its totient is φ = 9548640.

The previous prime is 28646021. The next prime is 28646047. The reversal of 28646028 is 82064682.

28646028 is a `hidden beast` number, since 2 + 8 + 646 + 0 + 2 + 8 = 666.

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 = 28645983 and 28646001.

It is not an unprimeable number, because it can be changed into a prime (28646021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132513 + ... + 132728.

It is an arithmetic number, because the mean of its divisors is an integer number (3094490).

Almost surely, 2^28646028 is an apocalyptic number.

It is an amenable number.

28646028 is an abundant number, since it is smaller than the sum of its proper divisors (45621732).

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

28646028 is a wasteful number, since it uses less digits than its factorization.

28646028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265254 (or 265246 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 28646028 is about 5352.1984268149. The cubic root of 28646028 is about 305.9765456841.

The spelling of 28646028 in words is "twenty-eight million, six hundred forty-six thousand, twenty-eight".