266212320 has 192 divisors, whose sum is σ = 924327936. Its totient is φ = 63866880.

The previous prime is 266212313. The next prime is 266212321. The reversal of 266212320 is 23212662.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266212321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 670362 + ... + 670758.

It is an arithmetic number, because the mean of its divisors is an integer number (4814208).

Almost surely, 2^266212320 is an apocalyptic number.

266212320 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 266212320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462163968).

266212320 is an abundant number, since it is smaller than the sum of its proper divisors (658115616).

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

266212320 is a wasteful number, since it uses less digits than its factorization.

266212320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 266212320 is about 16316.0142191652. The cubic root of 266212320 is about 643.2938261927.

Adding to 266212320 its reverse (23212662), we get a palindrome (289424982).

The spelling of 266212320 in words is "two hundred sixty-six million, two hundred twelve thousand, three hundred twenty".