18140460 has 72 divisors (see below), whose sum is σ = 55031760. Its totient is φ = 4462848.

The previous prime is 18140431. The next prime is 18140461. The reversal of 18140460 is 6404181.

It is a self number, because there is not a number n which added to its sum of digits gives 18140460.

It is not an unprimeable number, because it can be changed into a prime (18140461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9246 + ... + 11034.

It is an arithmetic number, because the mean of its divisors is an integer number (764330).

Almost surely, 2^18140460 is an apocalyptic number.

18140460 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 18140460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27515880).

18140460 is an abundant number, since it is smaller than the sum of its proper divisors (36891300).

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

18140460 is a wasteful number, since it uses less digits than its factorization.

18140460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827 (or 1812 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 18140460 is about 4259.1618893862. The cubic root of 18140460 is about 262.7540578883.

The spelling of 18140460 in words is "eighteen million, one hundred forty thousand, four hundred sixty".