266140 has 24 divisors (see below), whose sum is σ = 639072. Its totient is φ = 91200.

The previous prime is 266137. The next prime is 266153. The reversal of 266140 is 41662.

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, 811 + ... + 1090.

It is an arithmetic number, because the mean of its divisors is an integer number (26628).

2²⁶⁶¹⁴⁰ is an apocalyptic number.

266140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266140 is an abundant number, since it is smaller than the sum of its proper divisors (372932).

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

266140 is a wasteful number, since it uses less digits than its factorization.

266140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917 (or 1915 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 266140 is about 515.8875846539. The cubic root of 266140 is about 64.3235567903.

It can be divided in two parts, 2661 and 40, that added together give a triangular number (2701 = T₇₃).

The spelling of 266140 in words is "two hundred sixty-six thousand, one hundred forty".