280060225 has 9 divisors (see below), whose sum is σ = 347378467. Its totient is φ = 223981240.

The previous prime is 280060223. The next prime is 280060229. The reversal of 280060225 is 522060082.

The square root of 280060225 is 16735.

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

It can be written as a sum of positive squares in only one way, i.e., 100821681 + 179238544 = 10041^2 + 13388^2 .

It is not a de Polignac number, because 280060225 - 2¹ = 280060223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 280060225.

It is not an unprimeable number, because it can be changed into a prime (280060223) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 82002 + ... + 85348.

Almost surely, 2^280060225 is an apocalyptic number.

280060225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

280060225 is the 16735-th square number.

280060225 is the 8368-th centered octagonal number.

It is an amenable number.

280060225 is a deficient number, since it is larger than the sum of its proper divisors (67318242).

280060225 is an frugal number, since it uses more digits than its factorization.

280060225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6704 (or 3352 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The cubic root of 280060225 is about 654.2601634296.

Multiplying 280060225 by its sum of digits (25), we get a square (7001505625 = 83675²).

280060225 divided by its sum of digits (25) gives a square (11202409 = 3347²).

The spelling of 280060225 in words is "two hundred eighty million, sixty thousand, two hundred twenty-five".