280881002 has 4 divisors (see below), whose sum is σ = 421321506. Its totient is φ = 140440500.

The previous prime is 280881001. The next prime is 280881019. The reversal of 280881002 is 200188082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200188082 = 2 ⋅100094041.

It can be written as a sum of positive squares in only one way, i.e., 260531881 + 20349121 = 16141^2 + 4511^2 .

It is not an unprimeable number, because it can be changed into a prime (280881001) 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 as a sum of consecutive naturals, namely, 70220249 + ... + 70220252.

Almost surely, 2^280881002 is an apocalyptic number.

280881002 is a deficient number, since it is larger than the sum of its proper divisors (140440504).

280881002 is a wasteful number, since it uses less digits than its factorization.

280881002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140440503.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 280881002 is about 16759.5048256206. The cubic root of 280881002 is about 654.8986903117.

The spelling of 280881002 in words is "two hundred eighty million, eight hundred eighty-one thousand, two".