266753240 has 64 divisors (see below), whose sum is σ = 658627200. Its totient is φ = 96625152.

The previous prime is 266753237. The next prime is 266753299. The reversal of 266753240 is 42357662.

It is a self number, because there is not a number n which added to its sum of digits gives 266753240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22721 + ... + 32399.

It is an arithmetic number, because the mean of its divisors is an integer number (10291050).

Almost surely, 2^266753240 is an apocalyptic number.

266753240 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 266753240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329313600).

266753240 is an abundant number, since it is smaller than the sum of its proper divisors (391873960).

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

266753240 is a wasteful number, since it uses less digits than its factorization.

266753240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9756 (or 9752 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 266753240 is about 16332.5821595974. The cubic root of 266753240 is about 643.7292368959.

The spelling of 266753240 in words is "two hundred sixty-six million, seven hundred fifty-three thousand, two hundred forty".