28668635 has 16 divisors (see below), whose sum is σ = 35592480. Its totient is φ = 22152960.

The previous prime is 28668589. The next prime is 28668667. The reversal of 28668635 is 53686682.

It is not a de Polignac number, because 28668635 - 2⁶ = 28668571 is a prime.

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, 21704 + ... + 22986.

It is an arithmetic number, because the mean of its divisors is an integer number (2224530).

Almost surely, 2^28668635 is an apocalyptic number.

28668635 is a deficient number, since it is larger than the sum of its proper divisors (6923845).

28668635 is a wasteful number, since it uses less digits than its factorization.

28668635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438.

The product of its digits is 414720, while the sum is 44.

The square root of 28668635 is about 5354.3099462022. The cubic root of 28668635 is about 306.0570151638.

It can be divided in two parts, 286 and 68635, that added together give a cube (68921 = 41³).

The spelling of 28668635 in words is "twenty-eight million, six hundred sixty-eight thousand, six hundred thirty-five".