28785148 has 72 divisors (see below), whose sum is σ = 63603792. Its totient is φ = 11321856.

The previous prime is 28785091. The next prime is 28785179. The reversal of 28785148 is 84158782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176515 + ... + 176677.

It is an arithmetic number, because the mean of its divisors is an integer number (883386).

Almost surely, 2^28785148 is an apocalyptic number.

28785148 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 28785148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31801896).

28785148 is an abundant number, since it is smaller than the sum of its proper divisors (34818644).

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

28785148 is a wasteful number, since it uses less digits than its factorization.

28785148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 242 counting only the distinct ones).

The product of its digits is 143360, while the sum is 43.

The square root of 28785148 is about 5365.1792141549. The cubic root of 28785148 is about 306.4710730284.

The spelling of 28785148 in words is "twenty-eight million, seven hundred eighty-five thousand, one hundred forty-eight".