266244240 has 40 divisors (see below), whose sum is σ = 825357888. Its totient is φ = 70998400.

The previous prime is 266244229. The next prime is 266244247. The reversal of 266244240 is 42442662.

266244240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 266244198 and 266244207.

It is not an unprimeable number, because it can be changed into a prime (266244247) 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, 554436 + ... + 554915.

Almost surely, 2^266244240 is an apocalyptic number.

266244240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266244240 is an abundant number, since it is smaller than the sum of its proper divisors (559113648).

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

266244240 is a wasteful number, since it uses less digits than its factorization.

266244240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109367 (or 1109361 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 266244240 is about 16316.9923699192. The cubic root of 266244240 is about 643.3195363956.

The spelling of 266244240 in words is "two hundred sixty-six million, two hundred forty-four thousand, two hundred forty".