18080256 has 80 divisors (see below), whose sum is σ = 49104000. Its totient is φ = 5910528.

The previous prime is 18080243. The next prime is 18080273. The reversal of 18080256 is 65208081.

It is a congruent number.

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, 121270 + ... + 121418.

It is an arithmetic number, because the mean of its divisors is an integer number (613800).

Almost surely, 2^18080256 is an apocalyptic number.

18080256 is a gapful number since it is divisible by the number (16) 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 18080256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24552000).

18080256 is an abundant number, since it is smaller than the sum of its proper divisors (31023744).

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

18080256 is an equidigital number, since it uses as much as digits as its factorization.

18080256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 18080256 is about 4252.0884280551. The cubic root of 18080256 is about 262.4630623763.

It can be divided in two parts, 18080 and 256, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 18080256 in words is "eighteen million, eighty thousand, two hundred fifty-six".