28761803 has 8 divisors (see below), whose sum is σ = 33039072. Its totient is φ = 24526656.

The previous prime is 28761779. The next prime is 28761829. The reversal of 28761803 is 30816782.

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

It is not a de Polignac number, because 28761803 - 2¹⁸ = 28499659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28761833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9050 + ... + 11807.

It is an arithmetic number, because the mean of its divisors is an integer number (4129884).

Almost surely, 2^28761803 is an apocalyptic number.

28761803 is a deficient number, since it is larger than the sum of its proper divisors (4277269).

28761803 is a wasteful number, since it uses less digits than its factorization.

28761803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21061.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28761803 is about 5363.0031698667. The cubic root of 28761803 is about 306.3882004048.

The spelling of 28761803 in words is "twenty-eight million, seven hundred sixty-one thousand, eight hundred three".