281630828 has 24 divisors (see below), whose sum is σ = 508408992. Its totient is φ = 136404864.

The previous prime is 281630807. The next prime is 281630831. The reversal of 281630828 is 828036182.

It is a junction number, because it is equal to n+sod(n) for n = 281630791 and 281630800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30401 + ... + 38567.

It is an arithmetic number, because the mean of its divisors is an integer number (21183708).

Almost surely, 2^281630828 is an apocalyptic number.

It is an amenable number.

281630828 is a deficient number, since it is larger than the sum of its proper divisors (226778164).

281630828 is a wasteful number, since it uses less digits than its factorization.

281630828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8441 (or 8439 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 281630828 is about 16781.8600876065. The cubic root of 281630828 is about 655.4809342026.

The spelling of 281630828 in words is "two hundred eighty-one million, six hundred thirty thousand, eight hundred twenty-eight".