280438 has 8 divisors (see below), whose sum is σ = 423000. Its totient is φ = 139440.

The previous prime is 280411. The next prime is 280451. The reversal of 280438 is 834082.

280438 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313 + ... + 811.

It is an arithmetic number, because the mean of its divisors is an integer number (52875).

2²⁸⁰⁴³⁸ is an apocalyptic number.

280438 is a deficient number, since it is larger than the sum of its proper divisors (142562).

280438 is a wasteful number, since it uses less digits than its factorization.

280438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 280438 is about 529.5639715842. The cubic root of 280438 is about 65.4554209806.

The spelling of 280438 in words is "two hundred eighty thousand, four hundred thirty-eight".