281638048 has 24 divisors (see below), whose sum is σ = 587092212. Its totient is φ = 132535296.

The previous prime is 281637989. The next prime is 281638057. The reversal of 281638048 is 840836182.

It can be written as a sum of positive squares in 2 ways, for example, as 235561104 + 46076944 = 15348^2 + 6788^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 281638048.

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 3 ways as a sum of consecutive naturals, for example, 258315 + ... + 259402.

Almost surely, 2^281638048 is an apocalyptic number.

It is an amenable number.

281638048 is an abundant number, since it is smaller than the sum of its proper divisors (305454164).

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

281638048 is a wasteful number, since it uses less digits than its factorization.

281638048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517744 (or 517736 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 281638048 is about 16782.0751994502. The cubic root of 281638048 is about 655.4865355447.

The spelling of 281638048 in words is "two hundred eighty-one million, six hundred thirty-eight thousand, forty-eight".