284047881 has 16 divisors (see below), whose sum is σ = 408530304. Its totient is φ = 174513024.

The previous prime is 284047879. The next prime is 284047901. The reversal of 284047881 is 188740482.

It is not a de Polignac number, because 284047881 - 2¹ = 284047879 is a prime.

It is a super-2 number, since 2×284047881² = 161366397401180322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (284047081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19605 + ... + 30861.

It is an arithmetic number, because the mean of its divisors is an integer number (25533144).

Almost surely, 2^284047881 is an apocalyptic number.

It is an amenable number.

284047881 is a deficient number, since it is larger than the sum of its proper divisors (124482423).

284047881 is a wasteful number, since it uses less digits than its factorization.

284047881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11920.

The product of its (nonzero) digits is 114688, while the sum is 42.

The square root of 284047881 is about 16853.7200937953. The cubic root of 284047881 is about 657.3507830265.

It can be divided in two parts, 2840 and 47881, that added together give a triangular number (50721 = T₃₁₈).

The spelling of 284047881 in words is "two hundred eighty-four million, forty-seven thousand, eight hundred eighty-one".