28842238 has 4 divisors (see below), whose sum is σ = 43263360. Its totient is φ = 14421118.

The previous prime is 28842221. The next prime is 28842241. The reversal of 28842238 is 83224882.

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 = 28842197 and 28842206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7210558 + ... + 7210561.

It is an arithmetic number, because the mean of its divisors is an integer number (10815840).

Almost surely, 2^28842238 is an apocalyptic number.

28842238 is a deficient number, since it is larger than the sum of its proper divisors (14421122).

28842238 is a wasteful number, since it uses less digits than its factorization.

28842238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14421121.

The product of its digits is 49152, while the sum is 37.

The square root of 28842238 is about 5370.4969974854. The cubic root of 28842238 is about 306.6735487323.

The spelling of 28842238 in words is "twenty-eight million, eight hundred forty-two thousand, two hundred thirty-eight".