283820 has 24 divisors (see below), whose sum is σ = 622944. Its totient is φ = 108416.

The previous prime is 283817. The next prime is 283831. The reversal of 283820 is 28382.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 152 + ... + 768.

It is an arithmetic number, because the mean of its divisors is an integer number (25956).

2²⁸³⁸²⁰ is an apocalyptic number.

283820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 283820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311472).

283820 is an abundant number, since it is smaller than the sum of its proper divisors (339124).

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

283820 is a wasteful number, since it uses less digits than its factorization.

283820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 283820 is about 532.7475950204. The cubic root of 283820 is about 65.7174946673.

The spelling of 283820 in words is "two hundred eighty-three thousand, eight hundred twenty".