28041238 has 4 divisors (see below), whose sum is σ = 42061860. Its totient is φ = 14020618.

The previous prime is 28041217. The next prime is 28041257. The reversal of 28041238 is 83214082.

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

It is a super-2 number, since 2×28041238² = 1572622057145288, which contains 22 as substring.

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, 7010308 + ... + 7010311.

It is an arithmetic number, because the mean of its divisors is an integer number (10515465).

Almost surely, 2^28041238 is an apocalyptic number.

28041238 is a deficient number, since it is larger than the sum of its proper divisors (14020622).

28041238 is a wasteful number, since it uses less digits than its factorization.

28041238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14020621.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 28041238 is about 5295.3978131959. The cubic root of 28041238 is about 303.8078988909.

The spelling of 28041238 in words is "twenty-eight million, forty-one thousand, two hundred thirty-eight".