28669288 has 8 divisors (see below), whose sum is σ = 53754930. Its totient is φ = 14334640.

The previous prime is 28669283. The next prime is 28669297. The reversal of 28669288 is 88296682.

It can be written as a sum of positive squares in only one way, i.e., 25786084 + 2883204 = 5078^2 + 1698^2 .

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 (28669283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1791823 + ... + 1791838.

Almost surely, 2^28669288 is an apocalyptic number.

It is an amenable number.

28669288 is a deficient number, since it is larger than the sum of its proper divisors (25085642).

28669288 is a wasteful number, since it uses less digits than its factorization.

28669288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583667 (or 3583663 counting only the distinct ones).

The product of its digits is 663552, while the sum is 49.

The square root of 28669288 is about 5354.3709247679. The cubic root of 28669288 is about 306.0593388847.

The spelling of 28669288 in words is "twenty-eight million, six hundred sixty-nine thousand, two hundred eighty-eight".