268515018 has 48 divisors (see below), whose sum is σ = 617423040. Its totient is φ = 84154752.

The previous prime is 268514977. The next prime is 268515019. The reversal of 268515018 is 810515862.

It is not an unprimeable number, because it can be changed into a prime (268515019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18930 + ... + 29922.

It is an arithmetic number, because the mean of its divisors is an integer number (12862980).

Almost surely, 2^268515018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 268515018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308711520).

268515018 is an abundant number, since it is smaller than the sum of its proper divisors (348908022).

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

268515018 is a wasteful number, since it uses less digits than its factorization.

268515018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11083 (or 11080 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 268515018 is about 16386.4278596648. The cubic root of 268515018 is about 645.1433032952.

The spelling of 268515018 in words is "two hundred sixty-eight million, five hundred fifteen thousand, eighteen".