281690422820 has 48 divisors (see below), whose sum is σ = 595185999408. Its totient is φ = 111984053760.

The previous prime is 281690422781. The next prime is 281690422861. The reversal of 281690422820 is 28224096182.

It can be written as a sum of positive squares in 8 ways, for example, as 112955143744 + 168735279076 = 336088^2 + 410774^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10577762 + ... + 10604358.

It is an arithmetic number, because the mean of its divisors is an integer number (12399708321).

Almost surely, 2^281690422820 is an apocalyptic number.

281690422820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

281690422820 is an abundant number, since it is smaller than the sum of its proper divisors (313495576588).

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

281690422820 is a wasteful number, since it uses less digits than its factorization.

281690422820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29840 (or 29838 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 281690422820 in words is "two hundred eighty-one billion, six hundred ninety million, four hundred twenty-two thousand, eight hundred twenty".