28009634 has 8 divisors (see below), whose sum is σ = 42335568. Its totient is φ = 13897780.

The previous prime is 28009609. The next prime is 28009637. The reversal of 28009634 is 43690082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28009634.

It is not an unprimeable number, because it can be changed into a prime (28009637) 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, 53192 + ... + 53715.

It is an arithmetic number, because the mean of its divisors is an integer number (5291946).

Almost surely, 2^28009634 is an apocalyptic number.

28009634 is a deficient number, since it is larger than the sum of its proper divisors (14325934).

28009634 is a wasteful number, since it uses less digits than its factorization.

28009634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107040.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 28009634 is about 5292.4128712715. The cubic root of 28009634 is about 303.6937199775.

The spelling of 28009634 in words is "twenty-eight million, nine thousand, six hundred thirty-four".