28230328 has 32 divisors (see below), whose sum is σ = 60716160. Its totient is φ = 12054240.

The previous prime is 28230299. The next prime is 28230329. The reversal of 28230328 is 82303282.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 28230296 and 28230305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28230329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17775 + ... + 19297.

It is an arithmetic number, because the mean of its divisors is an integer number (1897380).

Almost surely, 2^28230328 is an apocalyptic number.

28230328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28230328 is an abundant number, since it is smaller than the sum of its proper divisors (32485832).

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

28230328 is a wasteful number, since it uses less digits than its factorization.

28230328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867 (or 1863 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28230328 is about 5313.2219979971. The cubic root of 28230328 is about 304.4892571816.

The spelling of 28230328 in words is "twenty-eight million, two hundred thirty thousand, three hundred twenty-eight".