281422889 has 24 divisors (see below), whose sum is σ = 328009920. Its totient is φ = 240593760.

The previous prime is 281422877. The next prime is 281422907. The reversal of 281422889 is 988224182.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-281422889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (281422819) 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 23 ways as a sum of consecutive naturals, for example, 383567 + ... + 384299.

It is an arithmetic number, because the mean of its divisors is an integer number (13667080).

Almost surely, 2^281422889 is an apocalyptic number.

It is an amenable number.

281422889 is a deficient number, since it is larger than the sum of its proper divisors (46587031).

281422889 is a wasteful number, since it uses less digits than its factorization.

281422889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941 (or 930 counting only the distinct ones).

The product of its digits is 147456, while the sum is 44.

The square root of 281422889 is about 16775.6635934320. The cubic root of 281422889 is about 655.3195721221.

The spelling of 281422889 in words is "two hundred eighty-one million, four hundred twenty-two thousand, eight hundred eighty-nine".