281000289604 has 12 divisors (see below), whose sum is σ = 492358362300. Its totient is φ = 140326471808.

The previous prime is 281000289599. The next prime is 281000289671. The reversal of 281000289604 is 406982000182.

It can be written as a sum of positive squares in 2 ways, for example, as 153979329604 + 127020960000 = 392402^2 + 356400^2 .

It is a super-2 number, since 2×281000289604² (a number of 24 digits) contains 22 as substring.

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, 43414609 + ... + 43421080.

It is an arithmetic number, because the mean of its divisors is an integer number (41029863525).

Almost surely, 2^281000289604 is an apocalyptic number.

It is an amenable number.

281000289604 is a deficient number, since it is larger than the sum of its proper divisors (211358072696).

281000289604 is a wasteful number, since it uses less digits than its factorization.

281000289604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86836502 (or 86836500 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

Adding to 281000289604 its reverse (406982000182), we get a palindrome (687982289786).

The spelling of 281000289604 in words is "two hundred eighty-one billion, two hundred eighty-nine thousand, six hundred four".