281286305872 has 80 divisors (see below), whose sum is σ = 645937282368. Its totient is φ = 116977674240.

The previous prime is 281286305869. The next prime is 281286305897. The reversal of 281286305872 is 278503682182.

It is a super-2 number, since 2×281286305872² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285438 + ... + 802525.

Almost surely, 2^281286305872 is an apocalyptic number.

281286305872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

281286305872 is an abundant number, since it is smaller than the sum of its proper divisors (364650976496).

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

281286305872 is a wasteful number, since it uses less digits than its factorization.

281286305872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088108 (or 1088102 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 281286305872 in words is "two hundred eighty-one billion, two hundred eighty-six million, three hundred five thousand, eight hundred seventy-two".