28668232 has 8 divisors (see below), whose sum is σ = 53752950. Its totient is φ = 14334112.

The previous prime is 28668221. The next prime is 28668247. The reversal of 28668232 is 23286682.

It can be written as a sum of positive squares in only one way, i.e., 28665316 + 2916 = 5354^2 + 54^2 .

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

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28668191 and 28668200.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1791757 + ... + 1791772.

Almost surely, 2^28668232 is an apocalyptic number.

It is an amenable number.

28668232 is a deficient number, since it is larger than the sum of its proper divisors (25084718).

28668232 is a wasteful number, since it uses less digits than its factorization.

28668232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583535 (or 3583531 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 28668232 is about 5354.2723128358. The cubic root of 28668232 is about 306.0555810582.

It can be divided in two parts, 28668 and 232, that added together give a square (28900 = 170²).

The spelling of 28668232 in words is "twenty-eight million, six hundred sixty-eight thousand, two hundred thirty-two".