28242236 has 36 divisors (see below), whose sum is σ = 57300936. Its totient is φ = 12076800.

The previous prime is 28242223. The next prime is 28242239. The reversal of 28242236 is 63224282.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28242199 and 28242208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28242239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11606 + ... + 13826.

Almost surely, 2^28242236 is an apocalyptic number.

It is an amenable number.

28242236 is an abundant number, since it is smaller than the sum of its proper divisors (29058700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28242236 is a wasteful number, since it uses less digits than its factorization.

28242236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270 (or 2251 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 28242236 is about 5314.3424804956. The cubic root of 28242236 is about 304.5320639623.

The spelling of 28242236 in words is "twenty-eight million, two hundred forty-two thousand, two hundred thirty-six".