256063220 has 96 divisors (see below), whose sum is σ = 633696000. Its totient is φ = 86873472.

The previous prime is 256063187. The next prime is 256063229. The reversal of 256063220 is 22360652.

It is a self number, because there is not a number n which added to its sum of digits gives 256063220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256063229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1118066 + ... + 1118294.

It is an arithmetic number, because the mean of its divisors is an integer number (6601000).

Almost surely, 2^256063220 is an apocalyptic number.

256063220 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 256063220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316848000).

256063220 is an abundant number, since it is smaller than the sum of its proper divisors (377632780).

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

256063220 is a wasteful number, since it uses less digits than its factorization.

256063220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 256063220 is about 16001.9755030434. The cubic root of 256063220 is about 635.0126849720.

It can be divided in two parts, 2560632 and 20, that added together give a palindrome (2560652).

The spelling of 256063220 in words is "two hundred fifty-six million, sixty-three thousand, two hundred twenty".