28064636 has 12 divisors (see below), whose sum is σ = 49918680. Its totient is φ = 13802160.

The previous prime is 28064633. The next prime is 28064639. The reversal of 28064636 is 63646082.

It is an interprime number because it is at equal distance from previous prime (28064633) and next prime (28064639).

It is a junction number, because it is equal to n+sod(n) for n = 28064596 and 28064605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28064633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57266 + ... + 57753.

It is an arithmetic number, because the mean of its divisors is an integer number (4159890).

Almost surely, 2^28064636 is an apocalyptic number.

It is an amenable number.

28064636 is a deficient number, since it is larger than the sum of its proper divisors (21854044).

28064636 is a wasteful number, since it uses less digits than its factorization.

28064636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115084 (or 115082 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 28064636 is about 5297.6066294129. The cubic root of 28064636 is about 303.8923759147.

The spelling of 28064636 in words is "twenty-eight million, sixty-four thousand, six hundred thirty-six".