266289040 has 40 divisors (see below), whose sum is σ = 620638848. Its totient is φ = 106254720.

The previous prime is 266289031. The next prime is 266289061. The reversal of 266289040 is 40982662.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30619 + ... + 38341.

Almost surely, 2^266289040 is an apocalyptic number.

266289040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266289040 is an abundant number, since it is smaller than the sum of its proper divisors (354349808).

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

266289040 is a wasteful number, since it uses less digits than its factorization.

266289040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8167 (or 8161 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 266289040 is about 16318.3651141896. The cubic root of 266289040 is about 643.3556174252.

The spelling of 266289040 in words is "two hundred sixty-six million, two hundred eighty-nine thousand, forty".