280038 has 16 divisors (see below), whose sum is σ = 611136. Its totient is φ = 84840.

The previous prime is 280037. The next prime is 280061. The reversal of 280038 is 830082.

It is a junction number, because it is equal to n+sod(n) for n = 279996 and 280023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2056 + ... + 2187.

It is an arithmetic number, because the mean of its divisors is an integer number (38196).

2²⁸⁰⁰³⁸ is an apocalyptic number.

280038 is an abundant number, since it is smaller than the sum of its proper divisors (331098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

280038 is a wasteful number, since it uses less digits than its factorization.

280038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 280038 is about 529.1861676197. The cubic root of 280038 is about 65.4242856061.

The spelling of 280038 in words is "two hundred eighty thousand, thirty-eight".