280007 has 16 divisors (see below), whose sum is σ = 366912. Its totient is φ = 207360.

The previous prime is 280001. The next prime is 280009. The reversal of 280007 is 700082.

It is a cyclic number.

It is not a de Polignac number, because 280007 - 2⁴ = 279991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1457 + ... + 1637.

It is an arithmetic number, because the mean of its divisors is an integer number (22932).

2²⁸⁰⁰⁰⁷ is an apocalyptic number.

280007 is a deficient number, since it is larger than the sum of its proper divisors (86905).

280007 is a wasteful number, since it uses less digits than its factorization.

280007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 280007 is about 529.1568765499. The cubic root of 280007 is about 65.4218713769.

280007 divided by its sum of digits (17) gives a triangular number (16471 = T₁₈₁).

Adding to 280007 its reverse (700082), we get a palindrome (980089).

The spelling of 280007 in words is "two hundred eighty thousand, seven".