18725288 has 8 divisors (see below), whose sum is σ = 35109930. Its totient is φ = 9362640.

The previous prime is 18725281. The next prime is 18725309. The reversal of 18725288 is 88252781.

It can be written as a sum of positive squares in only one way, i.e., 16826404 + 1898884 = 4102^2 + 1378^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (18725281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1170323 + ... + 1170338.

Almost surely, 2^18725288 is an apocalyptic number.

It is an amenable number.

18725288 is a deficient number, since it is larger than the sum of its proper divisors (16384642).

18725288 is a wasteful number, since it uses less digits than its factorization.

18725288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340667 (or 2340663 counting only the distinct ones).

The product of its digits is 71680, while the sum is 41.

The square root of 18725288 is about 4327.2725821238. The cubic root of 18725288 is about 265.5478780118.

The spelling of 18725288 in words is "eighteen million, seven hundred twenty-five thousand, two hundred eighty-eight".