28048340 has 12 divisors (see below), whose sum is σ = 58901556. Its totient is φ = 11219328.

The previous prime is 28048327. The next prime is 28048343. The reversal of 28048340 is 4384082.

It can be written as a sum of positive squares in 2 ways, for example, as 9351364 + 18696976 = 3058^2 + 4324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28048343) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 701189 + ... + 701228.

It is an arithmetic number, because the mean of its divisors is an integer number (4908463).

Almost surely, 2^28048340 is an apocalyptic number.

28048340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28048340 is an abundant number, since it is smaller than the sum of its proper divisors (30853216).

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

28048340 is a wasteful number, since it uses less digits than its factorization.

28048340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402426 (or 1402424 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 28048340 is about 5296.0683530332. The cubic root of 28048340 is about 303.8335451857.

The spelling of 28048340 in words is "twenty-eight million, forty-eight thousand, three hundred forty".