280003025 has 12 divisors (see below), whose sum is σ = 347513100. Its totient is φ = 223802880.

The previous prime is 280003001. The next prime is 280003027. The reversal of 280003025 is 520300082.

It can be written as a sum of positive squares in 6 ways, for example, as 18113536 + 261889489 = 4256^2 + 16183^2 .

It is not a de Polignac number, because 280003025 - 2⁸ = 280002769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 280002988 and 280003006.

It is not an unprimeable number, because it can be changed into a prime (280003027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27881 + ... + 36569.

It is an arithmetic number, because the mean of its divisors is an integer number (28959425).

Almost surely, 2^280003025 is an apocalyptic number.

280003025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

280003025 is a deficient number, since it is larger than the sum of its proper divisors (67510075).

280003025 is a wasteful number, since it uses less digits than its factorization.

280003025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9988 (or 9983 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 280003025 is about 16733.2909196010. The cubic root of 280003025 is about 654.2156179758.

The spelling of 280003025 in words is "two hundred eighty million, three thousand, twenty-five".