28668632 has 8 divisors (see below), whose sum is σ = 53753700. Its totient is φ = 14334312.

The previous prime is 28668589. The next prime is 28668667. The reversal of 28668632 is 23686682.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 28668632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1791782 + ... + 1791797.

Almost surely, 2^28668632 is an apocalyptic number.

It is an amenable number.

28668632 is a deficient number, since it is larger than the sum of its proper divisors (25085068).

28668632 is a wasteful number, since it uses less digits than its factorization.

28668632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583585 (or 3583581 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 28668632 is about 5354.3096660541. The cubic root of 28668632 is about 306.0570044882.

The spelling of 28668632 in words is "twenty-eight million, six hundred sixty-eight thousand, six hundred thirty-two".