28005502 has 8 divisors (see below), whose sum is σ = 48009456. Its totient is φ = 12002352.

The previous prime is 28005491. The next prime is 28005521. The reversal of 28005502 is 20550082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000183 + ... + 1000210.

It is an arithmetic number, because the mean of its divisors is an integer number (6001182).

Almost surely, 2^28005502 is an apocalyptic number.

28005502 is a deficient number, since it is larger than the sum of its proper divisors (20003954).

28005502 is a wasteful number, since it uses less digits than its factorization.

28005502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000402.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 28005502 is about 5292.0224867247. The cubic root of 28005502 is about 303.6787855427.

Adding to 28005502 its reverse (20550082), we get a palindrome (48555584).

The spelling of 28005502 in words is "twenty-eight million, five thousand, five hundred two".