18072256 has 28 divisors (see below), whose sum is σ = 37023040. Its totient is φ = 8743680.

The previous prime is 18072247. The next prime is 18072259. The reversal of 18072256 is 65227081.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (18072259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2571 + ... + 6538.

Almost surely, 2^18072256 is an apocalyptic number.

18072256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18072256 is an abundant number, since it is smaller than the sum of its proper divisors (18950784).

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

18072256 is an equidigital number, since it uses as much as digits as its factorization.

18072256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9152 (or 9142 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 18072256 is about 4251.1476097637. The cubic root of 18072256 is about 262.4243458474.

The spelling of 18072256 in words is "eighteen million, seventy-two thousand, two hundred fifty-six".