256020 has 48 divisors (see below), whose sum is σ = 762048. Its totient is φ = 64000.

The previous prime is 256019. The next prime is 256021. The reversal of 256020 is 20652.

It is an interprime number because it is at equal distance from previous prime (256019) and next prime (256021).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 895 + ... + 1145.

It is an arithmetic number, because the mean of its divisors is an integer number (15876).

2²⁵⁶⁰²⁰ is an apocalyptic number.

256020 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 256020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381024).

256020 is an abundant number, since it is smaller than the sum of its proper divisors (506028).

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

256020 is a wasteful number, since it uses less digits than its factorization.

256020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 256020 is about 505.9841894763. The cubic root of 256020 is about 63.4976955784.

Adding to 256020 its reverse (20652), we get a palindrome (276672).

The spelling of 256020 in words is "two hundred fifty-six thousand, twenty".