28318232 has 8 divisors (see below), whose sum is σ = 53096700. Its totient is φ = 14159112.

The previous prime is 28318231. The next prime is 28318237. The reversal of 28318232 is 23281382.

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

It is a junction number, because it is equal to n+sod(n) for n = 28318195 and 28318204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28318231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1769882 + ... + 1769897.

Almost surely, 2^28318232 is an apocalyptic number.

It is an amenable number.

28318232 is a deficient number, since it is larger than the sum of its proper divisors (24778468).

28318232 is a wasteful number, since it uses less digits than its factorization.

28318232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539785 (or 3539781 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 28318232 is about 5321.4877618952. The cubic root of 28318232 is about 304.8049707215.

The spelling of 28318232 in words is "twenty-eight million, three hundred eighteen thousand, two hundred thirty-two".