281800940 has 12 divisors (see below), whose sum is σ = 591782016. Its totient is φ = 112720368.

The previous prime is 281800927. The next prime is 281800957. The reversal of 281800940 is 49008182.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 281800897 and 281800906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7045004 + ... + 7045043.

It is an arithmetic number, because the mean of its divisors is an integer number (49315168).

Almost surely, 2^281800940 is an apocalyptic number.

281800940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281800940 is an abundant number, since it is smaller than the sum of its proper divisors (309981076).

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

281800940 is a wasteful number, since it uses less digits than its factorization.

281800940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14090056 (or 14090054 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 281800940 is about 16786.9276521941. The cubic root of 281800940 is about 655.6128832158.

The spelling of 281800940 in words is "two hundred eighty-one million, eight hundred thousand, nine hundred forty".