28338238 has 4 divisors (see below), whose sum is σ = 42507360. Its totient is φ = 14169118.

The previous prime is 28338229. The next prime is 28338239. The reversal of 28338238 is 83283382.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 28338197 and 28338206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28338239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7084558 + ... + 7084561.

It is an arithmetic number, because the mean of its divisors is an integer number (10626840).

Almost surely, 2^28338238 is an apocalyptic number.

28338238 is a deficient number, since it is larger than the sum of its proper divisors (14169122).

28338238 is a wasteful number, since it uses less digits than its factorization.

28338238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14169121.

The product of its digits is 55296, while the sum is 37.

The square root of 28338238 is about 5323.3671674984. The cubic root of 28338238 is about 304.8767324144.

The spelling of 28338238 in words is "twenty-eight million, three hundred thirty-eight thousand, two hundred thirty-eight".