281986072 has 32 divisors (see below), whose sum is σ = 584172000. Its totient is φ = 126928384.

The previous prime is 281986057. The next prime is 281986073. The reversal of 281986072 is 270689182.

It is a super-2 number, since 2×281986072² = 159032289603978368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281986073) 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, 41947 + ... + 48202.

It is an arithmetic number, because the mean of its divisors is an integer number (18255375).

Almost surely, 2^281986072 is an apocalyptic number.

It is an amenable number.

281986072 is an abundant number, since it is smaller than the sum of its proper divisors (302185928).

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

281986072 is a wasteful number, since it uses less digits than its factorization.

281986072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90195 (or 90191 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 281986072 is about 16792.4409184609. The cubic root of 281986072 is about 655.7564223094.

The spelling of 281986072 in words is "two hundred eighty-one million, nine hundred eighty-six thousand, seventy-two".