28903361 has 4 divisors (see below), whose sum is σ = 28914132. Its totient is φ = 28892592.

The previous prime is 28903337. The next prime is 28903367. The reversal of 28903361 is 16330982.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 17172736 + 11730625 = 4144^2 + 3425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28903361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28903367) 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, 2231 + ... + 7923.

It is an arithmetic number, because the mean of its divisors is an integer number (7228533).

Almost surely, 2^28903361 is an apocalyptic number.

It is an amenable number.

28903361 is a deficient number, since it is larger than the sum of its proper divisors (10771).

28903361 is an equidigital number, since it uses as much as digits as its factorization.

28903361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10770.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 28903361 is about 5376.1846136456. The cubic root of 28903361 is about 306.8900319498.

The spelling of 28903361 in words is "twenty-eight million, nine hundred three thousand, three hundred sixty-one".