28450128 has 40 divisors (see below), whose sum is σ = 83996608. Its totient is φ = 8128512.

The previous prime is 28450069. The next prime is 28450141. The reversal of 28450128 is 82105482.

It is a junction number, because it is equal to n+sod(n) for n = 28450095 and 28450104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42001 + ... + 42672.

Almost surely, 2^28450128 is an apocalyptic number.

28450128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28450128 is an abundant number, since it is smaller than the sum of its proper divisors (55546480).

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

28450128 is a wasteful number, since it uses less digits than its factorization.

28450128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84691 (or 84685 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 28450128 is about 5333.8661400526. The cubic root of 28450128 is about 305.2774613904.

The spelling of 28450128 in words is "twenty-eight million, four hundred fifty thousand, one hundred twenty-eight".