28238836 has 24 divisors (see below), whose sum is σ = 52557120. Its totient is φ = 13229952.

The previous prime is 28238801. The next prime is 28238839. The reversal of 28238836 is 63883282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28238839) 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, 17095 + ... + 18673.

It is an arithmetic number, because the mean of its divisors is an integer number (2189880).

Almost surely, 2^28238836 is an apocalyptic number.

It is an amenable number.

28238836 is a deficient number, since it is larger than the sum of its proper divisors (24318284).

28238836 is a wasteful number, since it uses less digits than its factorization.

28238836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863 (or 1861 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 28238836 is about 5314.0225818113. The cubic root of 28238836 is about 304.5198428977.

The spelling of 28238836 in words is "twenty-eight million, two hundred thirty-eight thousand, eight hundred thirty-six".