28603645 has 16 divisors (see below), whose sum is σ = 41293440. Its totient is φ = 18581184.

The previous prime is 28603637. The next prime is 28603711. The reversal of 28603645 is 54630682.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28603645 - 2³ = 28603637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28603645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20842 + ... + 22171.

It is an arithmetic number, because the mean of its divisors is an integer number (2580840).

Almost surely, 2^28603645 is an apocalyptic number.

It is an amenable number.

28603645 is a deficient number, since it is larger than the sum of its proper divisors (12689795).

28603645 is a wasteful number, since it uses less digits than its factorization.

28603645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43044.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 28603645 is about 5348.2375601688. The cubic root of 28603645 is about 305.8255694898.

The spelling of 28603645 in words is "twenty-eight million, six hundred three thousand, six hundred forty-five".