18048040 has 16 divisors (see below), whose sum is σ = 40608180. Its totient is φ = 7219200.

The previous prime is 18048029. The next prime is 18048049. The reversal of 18048040 is 4084081.

It can be written as a sum of positive squares in 2 ways, for example, as 17690436 + 357604 = 4206^2 + 598^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18047996 and 18048014.

It is not an unprimeable number, because it can be changed into a prime (18048049) 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, 225561 + ... + 225640.

Almost surely, 2^18048040 is an apocalyptic number.

18048040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18048040 is an abundant number, since it is smaller than the sum of its proper divisors (22560140).

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

18048040 is a wasteful number, since it uses less digits than its factorization.

18048040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451212 (or 451208 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 18048040 is about 4248.2984829223. The cubic root of 18048040 is about 262.3070812313.

The spelling of 18048040 in words is "eighteen million, forty-eight thousand, forty".