280738 has 16 divisors (see below), whose sum is σ = 466560. Its totient is φ = 126016.

The previous prime is 280729. The next prime is 280751. The reversal of 280738 is 837082.

It is a happy number.

280738 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603 + ... + 961.

It is an arithmetic number, because the mean of its divisors is an integer number (29160).

2²⁸⁰⁷³⁸ is an apocalyptic number.

280738 is a deficient number, since it is larger than the sum of its proper divisors (185822).

280738 is a wasteful number, since it uses less digits than its factorization.

280738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 280738 is about 529.8471477700. The cubic root of 280738 is about 65.4787530877.

The spelling of 280738 in words is "two hundred eighty thousand, seven hundred thirty-eight".