281049540 has 48 divisors (see below), whose sum is σ = 795795840. Its totient is φ = 74103040.

The previous prime is 281049533. The next prime is 281049553. The reversal of 281049540 is 45940182.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 20976 + ... + 31655.

It is an arithmetic number, because the mean of its divisors is an integer number (16579080).

Almost surely, 2^281049540 is an apocalyptic number.

281049540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281049540 is an abundant number, since it is smaller than the sum of its proper divisors (514746300).

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

281049540 is a wasteful number, since it uses less digits than its factorization.

281049540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52732 (or 52730 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 281049540 is about 16764.5322034347. The cubic root of 281049540 is about 655.0296511644.

The spelling of 281049540 in words is "two hundred eighty-one million, forty-nine thousand, five hundred forty".