281944401 has 8 divisors (see below), whose sum is σ = 395711520. Its totient is φ = 178070112.

The previous prime is 281944393. The next prime is 281944423. The reversal of 281944401 is 104449182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 281944401 - 2³ = 281944393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (281944451) by changing a digit.

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, 2473140 + ... + 2473253.

It is an arithmetic number, because the mean of its divisors is an integer number (49463940).

Almost surely, 2^281944401 is an apocalyptic number.

It is an amenable number.

281944401 is a deficient number, since it is larger than the sum of its proper divisors (113767119).

281944401 is a wasteful number, since it uses less digits than its factorization.

281944401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4946415.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 281944401 is about 16791.2001060079. The cubic root of 281944401 is about 655.7241188557.

The spelling of 281944401 in words is "two hundred eighty-one million, nine hundred forty-four thousand, four hundred one".