28449828 has 36 divisors (see below), whose sum is σ = 78453648. Its totient is φ = 8621040.

The previous prime is 28449803. The next prime is 28449833. The reversal of 28449828 is 82894482.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35526 + ... + 36317.

It is an arithmetic number, because the mean of its divisors is an integer number (2179268).

Almost surely, 2^28449828 is an apocalyptic number.

It is an amenable number.

28449828 is an abundant number, since it is smaller than the sum of its proper divisors (50003820).

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

28449828 is a wasteful number, since it uses less digits than its factorization.

28449828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71864 (or 71859 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 28449828 is about 5333.8380177879. The cubic root of 28449828 is about 305.2763883600.

The spelling of 28449828 in words is "twenty-eight million, four hundred forty-nine thousand, eight hundred twenty-eight".