280350 has 72 divisors (see below), whose sum is σ = 870480. Its totient is φ = 63360.

The previous prime is 280339. The next prime is 280351. The reversal of 280350 is 53082.

It is a super-2 number, since 2×280350² = 157192245000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280351) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3106 + ... + 3194.

It is an arithmetic number, because the mean of its divisors is an integer number (12090).

2²⁸⁰³⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435240).

280350 is an abundant number, since it is smaller than the sum of its proper divisors (590130).

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

280350 is a wasteful number, since it uses less digits than its factorization.

280350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 280350 is about 529.4808778417. The cubic root of 280350 is about 65.4485737397.

It can be divided in two parts, 280 and 350, that added together give a triangular number (630 = T₃₅).

The spelling of 280350 in words is "two hundred eighty thousand, three hundred fifty".