28248380 has 12 divisors (see below), whose sum is σ = 59321640. Its totient is φ = 11299344.

The previous prime is 28248379. The next prime is 28248397. The reversal of 28248380 is 8384282.

It is a self number, because there is not a number n which added to its sum of digits gives 28248380.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 706190 + ... + 706229.

It is an arithmetic number, because the mean of its divisors is an integer number (4943470).

Almost surely, 2^28248380 is an apocalyptic number.

28248380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28248380 is an abundant number, since it is smaller than the sum of its proper divisors (31073260).

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

28248380 is a wasteful number, since it uses less digits than its factorization.

28248380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412428 (or 1412426 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 28248380 is about 5314.9205074018. The cubic root of 28248380 is about 304.5541456575.

The spelling of 28248380 in words is "twenty-eight million, two hundred forty-eight thousand, three hundred eighty".