28658236 has 6 divisors (see below), whose sum is σ = 50151920. Its totient is φ = 14329116.

The previous prime is 28658233. The next prime is 28658237. The reversal of 28658236 is 63285682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28658233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3582276 + ... + 3582283.

Almost surely, 2^28658236 is an apocalyptic number.

It is an amenable number.

28658236 is a deficient number, since it is larger than the sum of its proper divisors (21493684).

28658236 is a wasteful number, since it uses less digits than its factorization.

28658236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7164563 (or 7164561 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 28658236 is about 5353.3387712716. The cubic root of 28658236 is about 306.0200052423.

The spelling of 28658236 in words is "twenty-eight million, six hundred fifty-eight thousand, two hundred thirty-six".