28669768 has 8 divisors (see below), whose sum is σ = 53755830. Its totient is φ = 14334880.

The previous prime is 28669763. The next prime is 28669787. The reversal of 28669768 is 86796682.

It can be written as a sum of positive squares in only one way, i.e., 24820324 + 3849444 = 4982^2 + 1962^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28669763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1791853 + ... + 1791868.

Almost surely, 2^28669768 is an apocalyptic number.

It is an amenable number.

28669768 is a deficient number, since it is larger than the sum of its proper divisors (25086062).

28669768 is a wasteful number, since it uses less digits than its factorization.

28669768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583727 (or 3583723 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 52.

The square root of 28669768 is about 5354.4157477730. The cubic root of 28669768 is about 306.0610469571.

The spelling of 28669768 in words is "twenty-eight million, six hundred sixty-nine thousand, seven hundred sixty-eight".