281447460820 has 12 divisors (see below), whose sum is σ = 591039667764. Its totient is φ = 112578984320.

The previous prime is 281447460803. The next prime is 281447460863. The reversal of 281447460820 is 28064744182.

It can be written as a sum of positive squares in 2 ways, for example, as 193615840324 + 87831620496 = 440018^2 + 296364^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7036186501 + ... + 7036186540.

It is an arithmetic number, because the mean of its divisors is an integer number (49253305647).

Almost surely, 2^281447460820 is an apocalyptic number.

281447460820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281447460820 is an abundant number, since it is smaller than the sum of its proper divisors (309592206944).

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

281447460820 is a wasteful number, since it uses less digits than its factorization.

281447460820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14072373050 (or 14072373048 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 46.

The spelling of 281447460820 in words is "two hundred eighty-one billion, four hundred forty-seven million, four hundred sixty thousand, eight hundred twenty".