281982428 has 48 divisors (see below), whose sum is σ = 628313280. Its totient is φ = 107702784.

The previous prime is 281982377. The next prime is 281982487. The reversal of 281982428 is 824289182.

It is a happy number.

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, 2801 + ... + 23912.

It is an arithmetic number, because the mean of its divisors is an integer number (13089860).

Almost surely, 2^281982428 is an apocalyptic number.

281982428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

281982428 is an abundant number, since it is smaller than the sum of its proper divisors (346330852).

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

281982428 is a wasteful number, since it uses less digits than its factorization.

281982428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26766 (or 26764 counting only the distinct ones).

The product of its digits is 147456, while the sum is 44.

The square root of 281982428 is about 16792.3324169098. The cubic root of 281982428 is about 655.7535975993.

The spelling of 281982428 in words is "two hundred eighty-one million, nine hundred eighty-two thousand, four hundred twenty-eight".