28904263 has 8 divisors (see below), whose sum is σ = 30769200. Its totient is φ = 27073728.

The previous prime is 28904251. The next prime is 28904273. The reversal of 28904263 is 36240982.

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

It is a cyclic number.

It is not a de Polignac number, because 28904263 - 2⁹ = 28903751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28904203) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6856 + ... + 10237.

It is an arithmetic number, because the mean of its divisors is an integer number (3846150).

Almost surely, 2^28904263 is an apocalyptic number.

28904263 is a deficient number, since it is larger than the sum of its proper divisors (1864937).

28904263 is a wasteful number, since it uses less digits than its factorization.

28904263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17201.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 28904263 is about 5376.2685014794. The cubic root of 28904263 is about 306.8932243343.

The spelling of 28904263 in words is "twenty-eight million, nine hundred four thousand, two hundred sixty-three".