28348885 has 4 divisors (see below), whose sum is σ = 34018668. Its totient is φ = 22679104.

The previous prime is 28348883. The next prime is 28348897. The reversal of 28348885 is 58884382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15689521 + 12659364 = 3961^2 + 3558^2 .

It is a cyclic number.

It is not a de Polignac number, because 28348885 - 2¹ = 28348883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28348883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2834884 + ... + 2834893.

It is an arithmetic number, because the mean of its divisors is an integer number (8504667).

Almost surely, 2^28348885 is an apocalyptic number.

It is an amenable number.

28348885 is a deficient number, since it is larger than the sum of its proper divisors (5669783).

28348885 is an equidigital number, since it uses as much as digits as its factorization.

28348885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5669782.

The product of its digits is 491520, while the sum is 46.

The square root of 28348885 is about 5324.3670985386. The cubic root of 28348885 is about 304.9149095249.

The spelling of 28348885 in words is "twenty-eight million, three hundred forty-eight thousand, eight hundred eighty-five".