28205514 has 24 divisors (see below), whose sum is σ = 61290372. Its totient is φ = 9374400.

The previous prime is 28205509. The next prime is 28205561. The reversal of 28205514 is 41550282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26471025 + 1734489 = 5145^2 + 1317^2 .

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 11 ways as a sum of consecutive naturals, for example, 4614 + ... + 8814.

Almost surely, 2^28205514 is an apocalyptic number.

28205514 is an abundant number, since it is smaller than the sum of its proper divisors (33084858).

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

28205514 is a wasteful number, since it uses less digits than its factorization.

28205514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4582 (or 4579 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 28205514 is about 5310.8863667000. The cubic root of 28205514 is about 304.4000173251.

Adding to 28205514 its reverse (41550282), we get a palindrome (69755796).

The spelling of 28205514 in words is "twenty-eight million, two hundred five thousand, five hundred fourteen".