28428048 has 120 divisors (see below), whose sum is σ = 88092576. Its totient is φ = 8486400.

The previous prime is 28428017. The next prime is 28428053. The reversal of 28428048 is 84082482.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 207436 + ... + 207572.

Almost surely, 2^28428048 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 28428048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44046288).

28428048 is an abundant number, since it is smaller than the sum of its proper divisors (59664528).

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

28428048 is a wasteful number, since it uses less digits than its factorization.

28428048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 36.

The square root of 28428048 is about 5331.7959450827. The cubic root of 28428048 is about 305.1984661880.

The spelling of 28428048 in words is "twenty-eight million, four hundred twenty-eight thousand, forty-eight".