281232280 has 32 divisors (see below), whose sum is σ = 723169440. Its totient is φ = 96422400.

The previous prime is 281232271. The next prime is 281232311. The reversal of 281232280 is 82232182.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501921 + ... + 502480.

It is an arithmetic number, because the mean of its divisors is an integer number (22599045).

Almost surely, 2^281232280 is an apocalyptic number.

281232280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281232280 is an abundant number, since it is smaller than the sum of its proper divisors (441937160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281232280 is a wasteful number, since it uses less digits than its factorization.

281232280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004419 (or 1004415 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 281232280 is about 16769.9815145992. The cubic root of 281232280 is about 655.1715884003.

It can be divided in two parts, 28123 and 2280, that added together give a palindrome (30403).

The spelling of 281232280 in words is "two hundred eighty-one million, two hundred thirty-two thousand, two hundred eighty".