28669384 has 8 divisors (see below), whose sum is σ = 53755110. Its totient is φ = 14334688.

The previous prime is 28669369. The next prime is 28669393. The reversal of 28669384 is 48396682.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18922500 + 9746884 = 4350^2 + 3122^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1791829 + ... + 1791844.

Almost surely, 2^28669384 is an apocalyptic number.

It is an amenable number.

28669384 is a deficient number, since it is larger than the sum of its proper divisors (25085726).

28669384 is a wasteful number, since it uses less digits than its factorization.

28669384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583679 (or 3583675 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The square root of 28669384 is about 5354.3798893990. The cubic root of 28669384 is about 306.0596805007.

The spelling of 28669384 in words is "twenty-eight million, six hundred sixty-nine thousand, three hundred eighty-four".