28003238 has 8 divisors (see below), whose sum is σ = 42580488. Its totient is φ = 13809744.

The previous prime is 28003231. The next prime is 28003249. The reversal of 28003238 is 83230082.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28003231) 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, 95756 + ... + 96047.

It is an arithmetic number, because the mean of its divisors is an integer number (5322561).

Almost surely, 2^28003238 is an apocalyptic number.

28003238 is a deficient number, since it is larger than the sum of its proper divisors (14577250).

28003238 is a wasteful number, since it uses less digits than its factorization.

28003238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191878.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 28003238 is about 5291.8085755250. The cubic root of 28003238 is about 303.6706020639.

The spelling of 28003238 in words is "twenty-eight million, three thousand, two hundred thirty-eight".