281232428 has 12 divisors (see below), whose sum is σ = 521107272. Its totient is φ = 132344640.

The previous prime is 281232421. The next prime is 281232439. The reversal of 281232428 is 824232182.

281232428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 281232394 and 281232403.

It is not an unprimeable number, because it can be changed into a prime (281232421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2067818 + ... + 2067953.

It is an arithmetic number, because the mean of its divisors is an integer number (43425606).

Almost surely, 2^281232428 is an apocalyptic number.

It is an amenable number.

281232428 is a deficient number, since it is larger than the sum of its proper divisors (239874844).

281232428 is a wasteful number, since it uses less digits than its factorization.

281232428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4135792 (or 4135790 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 281232428 is about 16769.9859272451. The cubic root of 281232428 is about 655.1717033294.

The spelling of 281232428 in words is "two hundred eighty-one million, two hundred thirty-two thousand, four hundred twenty-eight".