18572256 has 72 divisors (see below), whose sum is σ = 53759160. Its totient is φ = 6080256.

The previous prime is 18572249. The next prime is 18572287. The reversal of 18572256 is 65227581.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18572256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16446 + ... + 17538.

It is an arithmetic number, because the mean of its divisors is an integer number (746655).

Almost surely, 2^18572256 is an apocalyptic number.

18572256 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 18572256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26879580).

18572256 is an abundant number, since it is smaller than the sum of its proper divisors (35186904).

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

18572256 is a wasteful number, since it uses less digits than its factorization.

18572256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168 (or 1157 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 18572256 is about 4309.5540372526. The cubic root of 18572256 is about 264.8225036628.

The spelling of 18572256 in words is "eighteen million, five hundred seventy-two thousand, two hundred fifty-six".