266729220 has 96 divisors (see below), whose sum is σ = 873532800. Its totient is φ = 67381632.

The previous prime is 266729219. The next prime is 266729233. The reversal of 266729220 is 22927662.

It is a super-2 number, since 2×266729220² = 142288953603616800, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2739 + ... + 23258.

It is an arithmetic number, because the mean of its divisors is an integer number (9099300).

Almost surely, 2^266729220 is an apocalyptic number.

266729220 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 266729220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436766400).

266729220 is an abundant number, since it is smaller than the sum of its proper divisors (606803580).

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

266729220 is a wasteful number, since it uses less digits than its factorization.

266729220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26034 (or 26026 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 266729220 is about 16331.8468031022. The cubic root of 266729220 is about 643.7099146184.

The spelling of 266729220 in words is "two hundred sixty-six million, seven hundred twenty-nine thousand, two hundred twenty".