280898 has 4 divisors (see below), whose sum is σ = 421350. Its totient is φ = 140448.

The previous prime is 280897. The next prime is 280909. The reversal of 280898 is 898082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 253009 + 27889 = 503^2 + 167^2 .

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280898.

It is not an unprimeable number, because it can be changed into a prime (280897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70223 + ... + 70226.

2²⁸⁰⁸⁹⁸ is an apocalyptic number.

280898 is a deficient number, since it is larger than the sum of its proper divisors (140452).

280898 is a wasteful number, since it uses less digits than its factorization.

280898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140451.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 280898 is about 529.9981132042. The cubic root of 280898 is about 65.4911900821.

The spelling of 280898 in words is "two hundred eighty thousand, eight hundred ninety-eight".