281828485 has 4 divisors (see below), whose sum is σ = 338194188. Its totient is φ = 225462784.

The previous prime is 281828483. The next prime is 281828509. The reversal of 281828485 is 584828182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52215076 + 229613409 = 7226^2 + 15153^2 .

It is a cyclic number.

It is not a de Polignac number, because 281828485 - 2¹ = 281828483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281828483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28182844 + ... + 28182853.

It is an arithmetic number, because the mean of its divisors is an integer number (84548547).

Almost surely, 2^281828485 is an apocalyptic number.

It is an amenable number.

281828485 is a deficient number, since it is larger than the sum of its proper divisors (56365703).

281828485 is an equidigital number, since it uses as much as digits as its factorization.

281828485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56365702.

The product of its digits is 327680, while the sum is 46.

The square root of 281828485 is about 16787.7480622030. The cubic root of 281828485 is about 655.6342437650.

The spelling of 281828485 in words is "two hundred eighty-one million, eight hundred twenty-eight thousand, four hundred eighty-five".