28103293 has 8 divisors (see below), whose sum is σ = 28713600. Its totient is φ = 27497568.

The previous prime is 28103287. The next prime is 28103297. The reversal of 28103293 is 39230182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28103293 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 (28103297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13105 + ... + 15097.

It is an arithmetic number, because the mean of its divisors is an integer number (3589200).

Almost surely, 2^28103293 is an apocalyptic number.

It is an amenable number.

28103293 is a deficient number, since it is larger than the sum of its proper divisors (610307).

28103293 is a wasteful number, since it uses less digits than its factorization.

28103293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 28103293 is about 5301.2539082749. The cubic root of 28103293 is about 304.0318417997.

The spelling of 28103293 in words is "twenty-eight million, one hundred three thousand, two hundred ninety-three".