18057860 has 24 divisors (see below), whose sum is σ = 38016216. Its totient is φ = 7205120.

The previous prime is 18057839. The next prime is 18057863. The reversal of 18057860 is 6875081.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 602176 + 17455684 = 776^2 + 4178^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18057860.

It is not an unprimeable number, because it can be changed into a prime (18057863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9554 + ... + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (1584009).

Almost surely, 2^18057860 is an apocalyptic number.

18057860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18057860 is an abundant number, since it is smaller than the sum of its proper divisors (19958356).

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

18057860 is a wasteful number, since it uses less digits than its factorization.

18057860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263 (or 2261 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 18057860 is about 4249.4540825852. The cubic root of 18057860 is about 262.3546466641.

The spelling of 18057860 in words is "eighteen million, fifty-seven thousand, eight hundred sixty".