281348988 has 24 divisors (see below), whose sum is σ = 658382592. Its totient is φ = 93511344.

The previous prime is 281348987. The next prime is 281348989. The reversal of 281348988 is 889843182.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (281348987) and next prime (281348989).

It is a self number, because there is not a number n which added to its sum of digits gives 281348988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281348987) 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 7 ways as a sum of consecutive naturals, for example, 29620 + ... + 37947.

It is an arithmetic number, because the mean of its divisors is an integer number (27432608).

Almost surely, 2^281348988 is an apocalyptic number.

It is an amenable number.

281348988 is an abundant number, since it is smaller than the sum of its proper divisors (377033604).

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

281348988 is a wasteful number, since it uses less digits than its factorization.

281348988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67921 (or 67919 counting only the distinct ones).

The product of its digits is 884736, while the sum is 51.

The square root of 281348988 is about 16773.4608235748. The cubic root of 281348988 is about 655.2622052989.

The spelling of 281348988 in words is "two hundred eighty-one million, three hundred forty-eight thousand, nine hundred eighty-eight".