28334328 has 64 divisors (see below), whose sum is σ = 78001920. Its totient is φ = 8576480.

The previous prime is 28334311. The next prime is 28334333. The reversal of 28334328 is 82343382.

It is a Cunningham number, because it is equal to 5323²-1.

It is a Harshad number since it is a multiple of its sum of digits (33).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31501 + ... + 32387.

It is an arithmetic number, because the mean of its divisors is an integer number (1218780).

Almost surely, 2^28334328 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 28334328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39000960).

28334328 is an abundant number, since it is smaller than the sum of its proper divisors (49667592).

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

28334328 is a wasteful number, since it uses less digits than its factorization.

28334328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929 (or 903 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The square root of 28334328 is about 5322.9999060680. Note that the first 4 decimals coincide. The cubic root of 28334328 is about 304.8627098670.

The spelling of 28334328 in words is "twenty-eight million, three hundred thirty-four thousand, three hundred twenty-eight".