28283442 has 32 divisors (see below), whose sum is σ = 62173440. Its totient is φ = 8506320.

The previous prime is 28283413. The next prime is 28283459. The reversal of 28283442 is 24438282.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7633 + ... + 10715.

It is an arithmetic number, because the mean of its divisors is an integer number (1942920).

Almost surely, 2^28283442 is an apocalyptic number.

28283442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28283442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31086720).

28283442 is an abundant number, since it is smaller than the sum of its proper divisors (33889998).

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

28283442 is a wasteful number, since it uses less digits than its factorization.

28283442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238.

The product of its digits is 24576, while the sum is 33.

The square root of 28283442 is about 5318.2179346093. The cubic root of 28283442 is about 304.6800981608.

The spelling of 28283442 in words is "twenty-eight million, two hundred eighty-three thousand, four hundred forty-two".