28310128 has 60 divisors (see below), whose sum is σ = 68936560. Its totient is φ = 11024640.

The previous prime is 28310123. The next prime is 28310137. The reversal of 28310128 is 82101382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28310123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12508 + ... + 14596.

Almost surely, 2^28310128 is an apocalyptic number.

28310128 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 28310128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34468280).

28310128 is an abundant number, since it is smaller than the sum of its proper divisors (40626432).

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

28310128 is a wasteful number, since it uses less digits than its factorization.

28310128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126 (or 2109 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 28310128 is about 5320.7262662159. The cubic root of 28310128 is about 304.7758919858.

The spelling of 28310128 in words is "twenty-eight million, three hundred ten thousand, one hundred twenty-eight".