281285406 has 16 divisors (see below), whose sum is σ = 625078800. Its totient is φ = 93761784.

The previous prime is 281285401. The next prime is 281285441. The reversal of 281285406 is 604582182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281285401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2604441 + ... + 2604548.

It is an arithmetic number, because the mean of its divisors is an integer number (39067425).

Almost surely, 2^281285406 is an apocalyptic number.

281285406 is an abundant number, since it is smaller than the sum of its proper divisors (343793394).

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

281285406 is a wasteful number, since it uses less digits than its factorization.

281285406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5209000 (or 5208994 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 281285406 is about 16771.5654009994. The cubic root of 281285406 is about 655.2128407230.

The spelling of 281285406 in words is "two hundred eighty-one million, two hundred eighty-five thousand, four hundred six".