266870240 has 96 divisors (see below), whose sum is σ = 776018880. Its totient is φ = 84455424.

The previous prime is 266870221. The next prime is 266870243. The reversal of 266870240 is 42078662.

266870240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 266870240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266870243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5396 + ... + 23724.

It is an arithmetic number, because the mean of its divisors is an integer number (8083530).

Almost surely, 2^266870240 is an apocalyptic number.

266870240 is a gapful number since it is divisible by the number (20) 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 266870240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388009440).

266870240 is an abundant number, since it is smaller than the sum of its proper divisors (509148640).

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

266870240 is a wasteful number, since it uses less digits than its factorization.

266870240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18364 (or 18356 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 266870240 is about 16336.1635643134. The cubic root of 266870240 is about 643.8233379860.

The spelling of 266870240 in words is "two hundred sixty-six million, eight hundred seventy thousand, two hundred forty".