28658536 has 32 divisors (see below), whose sum is σ = 56952000. Its totient is φ = 13481856.

The previous prime is 28658533. The next prime is 28658537. The reversal of 28658536 is 63585682.

It is a happy number.

It is a Smith number, since the sum of its digits (43) 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 = 28658492 and 28658501.

It is not an unprimeable number, because it can be changed into a prime (28658533) 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 in 7 ways as a sum of consecutive naturals, for example, 24820 + ... + 25948.

It is an arithmetic number, because the mean of its divisors is an integer number (1779750).

Almost surely, 2^28658536 is an apocalyptic number.

It is an amenable number.

28658536 is a deficient number, since it is larger than the sum of its proper divisors (28293464).

28658536 is a wasteful number, since it uses less digits than its factorization.

28658536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321 (or 1317 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The square root of 28658536 is about 5353.3667910951. The cubic root of 28658536 is about 306.0210730642.

The spelling of 28658536 in words is "twenty-eight million, six hundred fifty-eight thousand, five hundred thirty-six".