28123232 has 12 divisors (see below), whose sum is σ = 55367676. Its totient is φ = 14061600.

The previous prime is 28123229. The next prime is 28123241. The reversal of 28123232 is 23232182.

It is a junction number, because it is equal to n+sod(n) for n = 28123198 and 28123207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439394 + ... + 439457.

It is an arithmetic number, because the mean of its divisors is an integer number (4613973).

Almost surely, 2^28123232 is an apocalyptic number.

It is an amenable number.

28123232 is a deficient number, since it is larger than the sum of its proper divisors (27244444).

28123232 is an equidigital number, since it uses as much as digits as its factorization.

28123232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878861 (or 878853 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 28123232 is about 5303.1341676409. The cubic root of 28123232 is about 304.1037272996.

The spelling of 28123232 in words is "twenty-eight million, one hundred twenty-three thousand, two hundred thirty-two".