280220 has 12 divisors (see below), whose sum is σ = 588504. Its totient is φ = 112080.

The previous prime is 280219. The next prime is 280223. The reversal of 280220 is 22082.

It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 280195 and 280204.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280220.

It is not an unprimeable number, because it can be changed into a prime (280223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6986 + ... + 7025.

It is an arithmetic number, because the mean of its divisors is an integer number (49042).

2²⁸⁰²²⁰ is an apocalyptic number.

280220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280220 is an abundant number, since it is smaller than the sum of its proper divisors (308284).

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

280220 is a wasteful number, since it uses less digits than its factorization.

280220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14020 (or 14018 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 280220 is about 529.3581018554. The cubic root of 280220 is about 65.4384558751.

The spelling of 280220 in words is "two hundred eighty thousand, two hundred twenty".