18025280 has 112 divisors (see below), whose sum is σ = 52913280. Its totient is φ = 5695488.

The previous prime is 18025223. The next prime is 18025283. The reversal of 18025280 is 8252081.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18025283) 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, 28811 + ... + 29429.

It is an arithmetic number, because the mean of its divisors is an integer number (472440).

Almost surely, 2^18025280 is an apocalyptic number.

18025280 is a gapful number since it is divisible by the number (10) 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 18025280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26456640).

18025280 is an abundant number, since it is smaller than the sum of its proper divisors (34888000).

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

18025280 is a wasteful number, since it uses less digits than its factorization.

18025280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 18025280 is about 4245.6189183675. The cubic root of 18025280 is about 262.1967715518.

The spelling of 18025280 in words is "eighteen million, twenty-five thousand, two hundred eighty".