266915040 has 384 divisors, whose sum is σ = 1047997440. Its totient is φ = 55738368.

The previous prime is 266915029. The next prime is 266915041. The reversal of 266915040 is 40519662.

It is a junction number, because it is equal to n+sod(n) for n = 266914992 and 266915010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266915041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2362024 + ... + 2362136.

It is an arithmetic number, because the mean of its divisors is an integer number (2729160).

Almost surely, 2^266915040 is an apocalyptic number.

266915040 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 266915040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523998720).

266915040 is an abundant number, since it is smaller than the sum of its proper divisors (781082400).

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

266915040 is a wasteful number, since it uses less digits than its factorization.

266915040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 266915040 is about 16337.5346977443. The cubic root of 266915040 is about 643.8593625744.

The spelling of 266915040 in words is "two hundred sixty-six million, nine hundred fifteen thousand, forty".