28603655 has 4 divisors (see below), whose sum is σ = 34324392. Its totient is φ = 22882920.

The previous prime is 28603637. The next prime is 28603711. The reversal of 28603655 is 55630682.

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

It is not a de Polignac number, because 28603655 - 2⁶ = 28603591 is a prime.

It is a Duffinian number.

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, 2860361 + ... + 2860370.

It is an arithmetic number, because the mean of its divisors is an integer number (8581098).

Almost surely, 2^28603655 is an apocalyptic number.

28603655 is a deficient number, since it is larger than the sum of its proper divisors (5720737).

28603655 is an equidigital number, since it uses as much as digits as its factorization.

28603655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5720736.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 28603655 is about 5348.2384950561. The cubic root of 28603655 is about 305.8256051292.

The spelling of 28603655 in words is "twenty-eight million, six hundred three thousand, six hundred fifty-five".