283520 has 32 divisors (see below), whose sum is σ = 679320. Its totient is φ = 113152.

The previous prime is 283519. The next prime is 283541. The reversal of 283520 is 25382.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 283492 and 283501.

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, 419 + ... + 861.

2²⁸³⁵²⁰ is an apocalyptic number.

283520 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 283520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339660).

283520 is an abundant number, since it is smaller than the sum of its proper divisors (395800).

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

283520 is an equidigital number, since it uses as much as digits as its factorization.

283520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 283520 is about 532.4659613534. The cubic root of 283520 is about 65.6943318659.

The spelling of 283520 in words is "two hundred eighty-three thousand, five hundred twenty".