28912232 has 16 divisors (see below), whose sum is σ = 54317760. Its totient is φ = 14427504.

The previous prime is 28912193. The next prime is 28912249. The reversal of 28912232 is 23221982.

It is a junction number, because it is equal to n+sod(n) for n = 28912195 and 28912204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073 + ... + 7679.

It is an arithmetic number, because the mean of its divisors is an integer number (3394860).

Almost surely, 2^28912232 is an apocalyptic number.

It is an amenable number.

28912232 is a deficient number, since it is larger than the sum of its proper divisors (25405528).

28912232 is a wasteful number, since it uses less digits than its factorization.

28912232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7160 (or 7156 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 28912232 is about 5377.0095778230. The cubic root of 28912232 is about 306.9214255652.

It can be divided in two parts, 289 and 12232, that added together give a palindrome (12521).

The spelling of 28912232 in words is "twenty-eight million, nine hundred twelve thousand, two hundred thirty-two".