18728325 has 144 divisors (see below), whose sum is σ = 44568576. Its totient is φ = 7286400.

The previous prime is 18728323. The next prime is 18728363. The reversal of 18728325 is 52382781.

It is not a de Polignac number, because 18728325 - 2¹ = 18728323 is a prime.

Its product of digits (26880) is a multiple of the sum of its prime divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 18728325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18728321) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 398452 + ... + 398498.

It is an arithmetic number, because the mean of its divisors is an integer number (309504).

Almost surely, 2^18728325 is an apocalyptic number.

18728325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18728325 is an abundant number, since it is smaller than the sum of its proper divisors (25840251).

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

18728325 is a wasteful number, since it uses less digits than its factorization.

18728325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 96 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 18728325 is about 4327.6234817738. The cubic root of 18728325 is about 265.5622333818.

The spelling of 18728325 in words is "eighteen million, seven hundred twenty-eight thousand, three hundred twenty-five".