28203243 has 8 divisors (see below), whose sum is σ = 38404608. Its totient is φ = 18402024.

The previous prime is 28203233. The next prime is 28203247. The reversal of 28203243 is 34230282.

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

It is not a de Polignac number, because 28203243 - 2⁶ = 28203179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28203247) 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, 99871 + ... + 100152.

It is an arithmetic number, because the mean of its divisors is an integer number (4800576).

Almost surely, 2^28203243 is an apocalyptic number.

28203243 is a deficient number, since it is larger than the sum of its proper divisors (10201365).

28203243 is a wasteful number, since it uses less digits than its factorization.

28203243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200073.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 28203243 is about 5310.6725562776. The cubic root of 28203243 is about 304.3918473978.

The spelling of 28203243 in words is "twenty-eight million, two hundred three thousand, two hundred forty-three".