281010040 has 32 divisors (see below), whose sum is σ = 652671360. Its totient is φ = 108777600.

The previous prime is 281010001. The next prime is 281010049. The reversal of 281010040 is 40010182.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 281009996 and 281010023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281010049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112071 + ... + 114550.

It is an arithmetic number, because the mean of its divisors is an integer number (20395980).

Almost surely, 2^281010040 is an apocalyptic number.

281010040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281010040 is an abundant number, since it is smaller than the sum of its proper divisors (371661320).

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

281010040 is a wasteful number, since it uses less digits than its factorization.

281010040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226663 (or 226659 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 281010040 is about 16763.3540796584. The cubic root of 281010040 is about 654.9989627628.

The spelling of 281010040 in words is "two hundred eighty-one million, ten thousand, forty".