281947869872 has 40 divisors (see below), whose sum is σ = 578853076032. Its totient is φ = 132579200000.

The previous prime is 281947869871. The next prime is 281947869883. The reversal of 281947869872 is 278968749182.

It is a junction number, because it is equal to n+sod(n) for n = 281947869796 and 281947869805.

It is not an unprimeable number, because it can be changed into a prime (281947869871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44504 + ... + 752247.

Almost surely, 2^281947869872 is an apocalyptic number.

It is an amenable number.

281947869872 is an abundant number, since it is smaller than the sum of its proper divisors (296905206160).

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

281947869872 is a wasteful number, since it uses less digits than its factorization.

281947869872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798077 (or 798071 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 71.

The spelling of 281947869872 in words is "two hundred eighty-one billion, nine hundred forty-seven million, eight hundred sixty-nine thousand, eight hundred seventy-two".