280140494089 has 27 divisors (see below), whose sum is σ = 299978488053. Its totient is φ = 261575892864.

The previous prime is 280140494071. The next prime is 280140494093. The reversal of 280140494089 is 980494041082.

The square root of 280140494089 is 529283.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 207676161225 + 72464332864 = 455715^2 + 269192^2 .

It is not a de Polignac number, because 280140494089 - 2¹³ = 280140485897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280140494009) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 895017397 + ... + 895017709.

Almost surely, 2^280140494089 is an apocalyptic number.

280140494089 is the 529283-rd square number.

280140494089 is the 264642-nd centered octagonal number.

It is an amenable number.

280140494089 is a deficient number, since it is larger than the sum of its proper divisors (19837993964).

280140494089 is an frugal number, since it uses more digits than its factorization.

280140494089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

Multiplying 280140494089 by its sum of digits (49), we get a square (13726884210361 = 3704981²).

The spelling of 280140494089 in words is "two hundred eighty billion, one hundred forty million, four hundred ninety-four thousand, eighty-nine".