266872140 has 72 divisors (see below), whose sum is σ = 811098288. Its totient is φ = 71026560.

The previous prime is 266872129. The next prime is 266872153. The reversal of 266872140 is 41278662.

266872140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 266872095 and 266872104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117859 + ... + 120101.

It is an arithmetic number, because the mean of its divisors is an integer number (11265254).

Almost surely, 2^266872140 is an apocalyptic number.

266872140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266872140 is an abundant number, since it is smaller than the sum of its proper divisors (544226148).

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

266872140 is a wasteful number, since it uses less digits than its factorization.

266872140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919 (or 2914 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 266872140 is about 16336.2217173984. The cubic root of 266872140 is about 643.8248658963.

The spelling of 266872140 in words is "two hundred sixty-six million, eight hundred seventy-two thousand, one hundred forty".