266234240 has 64 divisors (see below), whose sum is σ = 653726160. Its totient is φ = 103606272.

The previous prime is 266234237. The next prime is 266234261. The reversal of 266234240 is 42432662.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18059 + ... + 29301.

Almost surely, 2^266234240 is an apocalyptic number.

266234240 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 266234240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326863080).

266234240 is an abundant number, since it is smaller than the sum of its proper divisors (387491920).

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

266234240 is a wasteful number, since it uses less digits than its factorization.

266234240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11299 (or 11287 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 266234240 is about 16316.6859380206. The cubic root of 266234240 is about 643.3114820418.

The spelling of 266234240 in words is "two hundred sixty-six million, two hundred thirty-four thousand, two hundred forty".