28343028 has 48 divisors (see below), whose sum is σ = 75841920. Its totient is φ = 8070144.

The previous prime is 28343023. The next prime is 28343047. The reversal of 28343028 is 82034382.

It is a junction number, because it is equal to n+sod(n) for n = 28342986 and 28343004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28343023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47500 + ... + 48092.

It is an arithmetic number, because the mean of its divisors is an integer number (1580040).

Almost surely, 2^28343028 is an apocalyptic number.

28343028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28343028 is an abundant number, since it is smaller than the sum of its proper divisors (47498892).

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

28343028 is a wasteful number, since it uses less digits than its factorization.

28343028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 28343028 is about 5323.8170517027. The cubic root of 28343028 is about 304.8939091736.

The spelling of 28343028 in words is "twenty-eight million, three hundred forty-three thousand, twenty-eight".