266256400 has 60 divisors (see below), whose sum is σ = 641932624. Its totient is φ = 106128000.

The previous prime is 266256383. The next prime is 266256401. The reversal of 266256400 is 4652662.

It is not an unprimeable number, because it can be changed into a prime (266256401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131395 + ... + 133405.

Almost surely, 2^266256400 is an apocalyptic number.

266256400 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 266256400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320966312).

266256400 is an abundant number, since it is smaller than the sum of its proper divisors (375676224).

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

266256400 is a wasteful number, since it uses less digits than its factorization.

266256400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360 (or 2349 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 266256400 is about 16317.3649833544. The cubic root of 266256400 is about 643.3293302181.

It can be divided in two parts, 266256 and 400, that multiplied together give a square (106502400 = 10320²).

The spelling of 266256400 in words is "two hundred sixty-six million, two hundred fifty-six thousand, four hundred".