280730025 has 27 divisors (see below), whose sum is σ = 503269221. Its totient is φ = 149588640.

The previous prime is 280730011. The next prime is 280730033. The reversal of 280730025 is 520037082.

The square root of 280730025 is 16755.

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 120758121 + 159971904 = 10989^2 + 12648^2 .

It is not a de Polignac number, because 280730025 - 2¹¹ = 280727977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 250767 + ... + 251883.

Almost surely, 2^280730025 is an apocalyptic number.

280730025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

280730025 is the 16755-th square number.

280730025 is the 8378-th centered octagonal number.

It is an amenable number.

280730025 is a deficient number, since it is larger than the sum of its proper divisors (222539196).

280730025 is an equidigital number, since it uses as much as digits as its factorization.

280730025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The cubic root of 280730025 is about 654.7813305762.

The spelling of 280730025 in words is "two hundred eighty million, seven hundred thirty thousand, twenty-five".