281630120 has 32 divisors (see below), whose sum is σ = 638668800. Its totient is φ = 111763008.

The previous prime is 281630077. The next prime is 281630123. The reversal of 281630120 is 21036182.

It is not an unprimeable number, because it can be changed into a prime (281630123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22640 + ... + 32799.

It is an arithmetic number, because the mean of its divisors is an integer number (19958400).

Almost surely, 2^281630120 is an apocalyptic number.

281630120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281630120 is an abundant number, since it is smaller than the sum of its proper divisors (357038680).

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

281630120 is a wasteful number, since it uses less digits than its factorization.

281630120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55577 (or 55573 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 281630120 is about 16781.8389933881. The cubic root of 281630120 is about 655.4803849245.

The spelling of 281630120 in words is "two hundred eighty-one million, six hundred thirty thousand, one hundred twenty".