281967916 has 12 divisors (see below), whose sum is σ = 522470088. Its totient is φ = 132690752.

The previous prime is 281967913. The next prime is 281967941. The reversal of 281967916 is 619769182.

It is a self number, because there is not a number n which added to its sum of digits gives 281967916.

It is not an unprimeable number, because it can be changed into a prime (281967911) 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, 2073226 + ... + 2073361.

It is an arithmetic number, because the mean of its divisors is an integer number (43539174).

Almost surely, 2^281967916 is an apocalyptic number.

It is an amenable number.

281967916 is a deficient number, since it is larger than the sum of its proper divisors (240502172).

281967916 is a wasteful number, since it uses less digits than its factorization.

281967916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4146608 (or 4146606 counting only the distinct ones).

The product of its digits is 326592, while the sum is 49.

The square root of 281967916 is about 16791.9003093754. The cubic root of 281967916 is about 655.7423481283.

The spelling of 281967916 in words is "two hundred eighty-one million, nine hundred sixty-seven thousand, nine hundred sixteen".